Deck 6: Rational Expressions and Equations

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Question
Find all numbers for which the rational expression is not defined.
9b+8\frac { 9 } { b + 8 }

A) b=0b = 0
B) None
C) b=8b = - 8
D) b=8b = 8
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Question
Find all numbers for which the rational expression is not defined.
d52d\frac { d - 5 } { 2 - d }

A) d=2,5d = 2,5
B) d=2d = - 2
C) d=2d = 2
D) None
Question
Multiply. Do not simplify.
x+5x+4x5x5\frac { x + 5 } { x + 4 } \cdot \frac { x - 5 } { x - 5 }

A) x+5(x+4)(x5)\frac { x + 5 } { ( x + 4 ) ( x - 5 ) }
B) (x+5)(x5)x+4\frac { ( x + 5 ) ( x - 5 ) } { x + 4 }
C) (x+4)(x5)(x+5)(x5)\frac { ( x + 4 ) ( x - 5 ) } { ( x + 5 ) ( x - 5 ) }
D) (x+5)(x5)(x+4)(x5)\frac { ( x + 5 ) ( x - 5 ) } { ( x + 4 ) ( x - 5 ) }
Question
Multiply. Do not simplify.
3y23y29z8x\frac { 3 y ^ { 2 } } { 3 y ^ { 2 } } \cdot \frac { 9 z } { 8 x }

A) (3y2)(8x)(3y2)(9z)\frac { \left( 3 y ^ { 2 } \right) ( 8 x ) } { \left( 3 y ^ { 2 } \right) ( 9 z ) }
B) (3y2)(9z)8x\frac { \left( 3 y ^ { 2 } \right) ( 9 z ) } { 8 x }
C) (3y2)(9z)(3y2)(8x)\frac { \left( 3 y ^ { 2 } \right) ( 9 z ) } { \left( 3 y ^ { 2 } \right) ( 8 x ) }
D) 9z(3y2)(8x)\frac { 9 \mathrm { z } } { \left( 3 \mathrm { y } ^ { 2 } \right) ( 8 \mathrm { x } ) }
Question
Simplify.
1010x5x5\frac { 10 - 10 x } { 5 x - 5 }

A) 2
B) 10x1010 x - 10
C) 2- 2
D) 5x55 x - 5
Question
Find all numbers for which the rational expression is not defined.
x281x27x+12\frac { x ^ { 2 } - 81 } { x ^ { 2 } - 7 x + 12 }

A) x=0x = 0
B) x=9x = 9 and x=9x = - 9
C) x=3x = - 3 and x=4x = - 4
D) x=3x = 3 and x=4x = 4
Question
Simplify.
15x+39\frac { 15 x + 3 } { 9 }

A) 5x+13\frac { 5 x + 1 } { 3 }
В) 5x3\frac { 5 x } { 3 }
C) 5x+15 x + 1
D) 5x+19\frac { 5 x + 1 } { 9 }
Question
Multiply. Do not simplify.
3x3xx9x+3\frac { 3 x } { 3 x } \cdot \frac { x - 9 } { x + 3 }

A) 3x(x9)x+3\frac { 3 x ( x - 9 ) } { x + 3 }
B) x93x(x+3)\frac { x - 9 } { 3 x ( x + 3 ) }
C) 3x(x9)3x(x+3)\frac { 3 x ( x - 9 ) } { 3 x ( x + 3 ) }
D) 3x(x+3)3x(x9)\frac { 3 x ( x + 3 ) } { 3 x ( x - 9 ) }
Question
Find all numbers for which the rational expression is not defined.
2a9\frac { 2 } { a - 9 }

A) None
B) a=9a = 9
C) a=9a = - 9
D) a=0a = 0
Question
Multiply. Do not simplify.
2a+19a1aa\frac { 2 a + 1 } { 9 a - 1 } \cdot \frac { a } { a }

A) (2a+1)a(9a1)a\frac { ( 2 a + 1 ) a } { ( 9 a - 1 ) a }
B) (2a+1)a9a1\frac { ( 2 a + 1 ) a } { 9 a - 1 }
C) (9a1)a(2a+1)a\frac { ( 9 a - 1 ) a } { ( 2 a + 1 ) a }
D) 2a+1(9a1)a\frac { 2 a + 1 } { ( 9 a - 1 ) a }
Question
Find all numbers for which the rational expression is not defined.
x216x2+2x24\frac { x ^ { 2 } - 16 } { x ^ { 2 } + 2 x - 24 }

A) x=4x = - 4 and x=6x = 6
B) x=4x = 4 and x=4x = - 4
C) x=4x = 4 and x=6x = - 6
D) x=0x = 0
Question
Find all numbers for which the rational expression is not defined.
x225x22x35\frac { x ^ { 2 } - 25 } { x ^ { 2 } - 2 x - 35 }

A) x=5x = - 5 and x=7x = 7
B) x=5x = 5 and x=5x = - 5
C) x=5x = 5 and x=7x = - 7
D) x=0x = 0
Question
Find all numbers for which the rational expression is not defined.
8y4y216\frac { 8 y - 4 } { y ^ { 2 } - 16 }

A) y=12y = \frac { 1 } { 2 }
B) y=4y = 4
C) y=4y = 4 and y=4y = - 4
D) y=16y = 16
Question
Simplify.
15k35k\frac { 15 k ^ { 3 } } { 5 k }

A) 3k23 \mathrm { k } ^ { 2 }
B) 10
C) 3k3 k
D) 10k210 \mathrm { k } ^ { 2 }
Question
Simplify.
12m3p26m8p\frac { 12 m ^ { 3 } p ^ { 2 } } { 6 m ^ { 8 } p }

A) 2m5p22 m ^ { 5 } p ^ { 2 }
B) 2m5p\frac { 2 m ^ { 5 } } { p }
C) 2pm5\frac { 2 p } { m ^ { 5 } }
D) 2mp2 \mathrm { mp }
Question
Simplify.
9x245x15x275x\frac { 9 x ^ { 2 } - 45 x } { 15 x ^ { 2 } - 75 x }

A) 3
B) 53\frac { 5 } { 3 }
C) 35\frac { 3 } { 5 }
D) x55x25\frac { x - 5 } { 5 x - 25 }
Question
Find all numbers for which the rational expression is not defined.
c79\frac { c - 7 } { 9 }

A) None
B) c=7c = 7
C) c=7\mathrm { c } = - 7
D) c=0\mathrm { c } = 0
Question
Simplify.
2m2+2m6m2+8m\frac { 2 m ^ { 2 } + 2 m } { 6 m ^ { 2 } + 8 m }

A) m+13m+4\frac { m + 1 } { 3 m + 4 }
B) m+1m+4\frac { m + 1 } { m + 4 }
C) m+23m+4\frac { m + 2 } { 3 m + 4 }
D) m2+13m2+4\frac { m ^ { 2 } + 1 } { 3 m ^ { 2 } + 4 }
Question
Find all numbers for which the rational expression is not defined.
b66b24\frac { b - 6 } { 6 b - 24 }

A) b=24b = 24
B) b=0b = 0
C) b=4b = 4
D) b=6b = - 6
Question
Multiply. Do not simplify.
x48x11\frac { x - 4 } { 8 - x } \cdot \frac { - 1 } { - 1 }

A) (x4)(1)8x\frac { ( x - 4 ) ( - 1 ) } { 8 - x }
B) x4(8x)(1)\frac { x - 4 } { ( 8 - x ) ( - 1 ) }
C) (8x)(1)(x4)(1)\frac { ( 8 - x ) ( - 1 ) } { ( x - 4 ) ( - 1 ) }
D) (x4)(1)(8x)(1)\frac { ( x - 4 ) ( - 1 ) } { ( 8 - x ) ( - 1 ) }
Question
Find the reciprocal.
y2+8y+9y2y+11\frac { y ^ { 2 } + 8 y + 9 } { y ^ { 2 } - y + 11 }

A) y2+8y9y2y11\frac { y ^ { 2 } + 8 y - 9 } { y ^ { 2 } - y - 11 }
B) y2y+11y2+8y+9\frac { y ^ { 2 } - y + 11 } { y ^ { 2 } + 8 y + 9 }
C) y29y+8y2+y+11\frac { y ^ { 2 } - 9 y + 8 } { y ^ { 2 } + y + 11 }
D) y2y11y2+8y9\frac { y ^ { 2 } - y - 11 } { y ^ { 2 } + 8 y - 9 }
Question
Multiply and, if possible, simplify.
3p3p8p27p7\frac { 3 p - 3 } { p } \cdot \frac { 8 p ^ { 2 } } { 7 p - 7 }

A) 21p2+42p+218p3\frac { 21 p ^ { 2 } + 42 p + 21 } { 8 p ^ { 3 } }
B) 24p7\frac { 24 p } { 7 }
C) 24p324p27p27p\frac { 24 p ^ { 3 } - 24 p ^ { 2 } } { 7 p ^ { 2 } - 7 p }
D) 724p\frac { 7 } { 24 p }
Question
Multiply and, if possible, simplify.
k2+9k+20k2+12k+32k2+8kk2+10k+25\frac { k ^ { 2 } + 9 k + 20 } { k ^ { 2 } + 12 k + 32 } \cdot \frac { k ^ { 2 } + 8 k } { k ^ { 2 } + 10 k + 25 }

A) kk2+12k+32\frac { k } { k ^ { 2 } + 12 k + 32 }
B) kk+5\frac { \mathrm { k } } { \mathrm { k } + 5 }
C) k2+8kk+5\frac { k ^ { 2 } + 8 k } { k + 5 }
D) 1k+5\frac { 1 } { \mathrm { k } + 5 }
Question
Find the reciprocal.
x2\frac { x } { 2 }

A) 12x\frac { 1 } { 2 x }
B) 2x\frac { 2 } { x }
C) 1x21 - \frac { x } { 2 }
D) x2- \frac { x } { 2 }
Question
Simplify.
y2+6y16y2+17y+72\frac { y ^ { 2 } + 6 y - 16 } { y ^ { 2 } + 17 y + 72 }

A) 6y+1617y17\frac { 6 y + 16 } { 17 y - 17 }
B) y2+6y16y2+17y+72- \frac { y ^ { 2 } + 6 y - 16 } { y ^ { 2 } + 17 y + 72 }
C) 6y1617y+72\frac { 6 y - 16 } { 17 y + 72 }
D) y2y+9\frac { y - 2 } { y + 9 }
Question
Find the reciprocal.
2x2+y2\frac { 2 } { x ^ { 2 } + y ^ { 2 } }

A) x2+y22\frac { x ^ { 2 } + y ^ { 2 } } { 2 }
B) 2x2+y2- \frac { 2 } { x ^ { 2 } + y ^ { 2 } }
C) 12x2+y2\frac { 1 } { 2 x ^ { 2 } + y ^ { 2 } }
D) 12x2+2y2x\frac { 1 } { 2 x ^ { 2 } + 2 y ^ { 2 } x }
Question
Simplify.
y2+4y12y2+3y18\frac { y ^ { 2 } + 4 y - 12 } { y ^ { 2 } + 3 y - 18 }

A) y2+4y12y2+3y18- \frac { y ^ { 2 } + 4 y - 12 } { y ^ { 2 } + 3 y - 18 }
B) y2y3\frac { y - 2 } { y - 3 }
C) 4y23y3\frac { 4 y - 2 } { 3 y - 3 }
D) 4y123y18\frac { 4 y - 12 } { 3 y - 18 }
Question
Multiply and, if possible, simplify.
x41x481x2+9x2+1\frac { x ^ { 4 } - 1 } { x ^ { 4 } - 81 } \cdot \frac { x ^ { 2 } + 9 } { x ^ { 2 } + 1 }

A) x+1x3\frac { x + 1 } { x - 3 }
B) x1x+3\frac { x - 1 } { x + 3 }
C) x1x3\frac { x - 1 } { x - 3 }
D) (x+1)(x1)(x+3)(x3)\frac { ( x + 1 ) ( x - 1 ) } { ( x + 3 ) ( x - 3 ) }
Question
Multiply and, if possible, simplify.
k2+7k+12k2+10k+24k2+6kk23k18\frac { k ^ { 2 } + 7 k + 12 } { k ^ { 2 } + 10 k + 24 } \cdot \frac { k ^ { 2 } + 6 k } { k ^ { 2 } - 3 k - 18 }

A) k2+6kk6\frac { k ^ { 2 } + 6 k } { k - 6 }
B) kk6\frac { k } { k - 6 }
C) 1k6\frac { 1 } { k - 6 }
D) kk2+10k+24\frac { k } { k ^ { 2 } + 10 k + 24 }
Question
Find the reciprocal.
t+11t2\frac { t + 11 } { t - 2 }

A) t+2t11\frac { t + 2 } { t - 11 }
B) t11t+2\frac { t - 11 } { t + 2 }
C) t2t+11\frac { t - 2 } { t + 11 }
D) 11+t2t\frac { 11 + t } { 2 - t }
Question
Multiply and, if possible, simplify.
7x2540x3\frac { 7 x ^ { 2 } } { 5 } \cdot \frac { 40 } { x ^ { 3 } }

A) x528\frac { x ^ { 5 } } { 28 }
B) x28\frac { x } { 28 }
C) 56x\frac { 56 } { x }
D) 56x2x3\frac { 56 x ^ { 2 } } { x ^ { 3 } }
Question
Find the reciprocal.
x2+123x\frac { x ^ { 2 } + 12 } { 3 - x }

A) 3xx2+12\frac { 3 - x } { x ^ { 2 } + 12 }
B) x2+312x\frac { x ^ { 2 } + 3 } { 12 - x }
C) x2+12x3\frac { x ^ { 2 } + 12 } { x - 3 }
D) 12xx2+3\frac { 12 - x } { x ^ { 2 } + 3 }
Question
Multiply and, if possible, simplify.
x2x264x213x+40x25x\frac { x ^ { 2 } } { x ^ { 2 } - 64 } \cdot \frac { x ^ { 2 } - 13 x + 40 } { x ^ { 2 } - 5 x }

A) xx+8\frac { x } { x + 8 }
B) x(x+8)(x+5)\frac { x } { ( x + 8 ) ( x + 5 ) }
C) x2x+8\frac { x ^ { 2 } } { x + 8 }
D) xx8\frac { x } { x - 8 }
Question
Simplify.
y2+5yy2+6y\frac { y ^ { 2 } + 5 y } { y ^ { 2 } + 6 y }

A) y2+5yy+6\frac { y ^ { 2 } + 5 y } { y + 6 }
B) 7y+108y+12\frac { 7 y + 10 } { 8 y + 12 }
C) y+5y2+6y\frac { y + 5 } { y ^ { 2 } + 6 y }
D) y+5y+6\frac { y + 5 } { y + 6 }
Question
Simplify.
4x+220x2+18x+4\frac { 4 x + 2 } { 20 x ^ { 2 } + 18 x + 4 }

A) 4x+55x+18\frac { 4 x + 5 } { 5 x + 18 }
B) 15x+2\frac { 1 } { 5 x + 2 }
C) 4x5x+2\frac { 4 x } { 5 x + 2 }
D) 4x+220x2+18x+4\frac { 4 x + 2 } { 20 x ^ { 2 } + 18 x + 4 }
Question
Multiply and, if possible, simplify.
2z348z2\frac { 2 z ^ { 3 } } { 4 } \cdot \frac { 8 } { z ^ { 2 } }

A) 4z\frac { 4 } { \mathrm { z } }
B) 4z4 \mathrm { z }
C) z4\frac { z } { 4 }
D) 4z2z3\frac { 4 z ^ { 2 } } { z ^ { 3 } }
Question
Find the reciprocal.
x2+8xyy2x27xy+y2\frac { x ^ { 2 } + 8 x y - y ^ { 2 } } { x ^ { 2 } - 7 x y + y ^ { 2 } }

A) x2+7xy+y2x28xyy2\frac { x ^ { 2 } + 7 x y + y ^ { 2 } } { x ^ { 2 } - 8 x y - y ^ { 2 } }
B) 1x27xyy2\frac { 1 } { x ^ { 2 } - 7 x y - y ^ { 2 } }
C) x27xy+y2x2+8xyy2\frac { x ^ { 2 } - 7 x y + y ^ { 2 } } { x ^ { 2 } + 8 x y - y ^ { 2 } }
D) x28xy+y2x2+7xyy2\frac { x ^ { 2 } - 8 x y + y ^ { 2 } } { x ^ { 2 } + 7 x y - y ^ { 2 } }
Question
Simplify.
y23y28y22y35\frac { y ^ { 2 } - 3 y - 28 } { y ^ { 2 } - 2 y - 35 }

A) 3y282y35\frac { - 3 y - 28 } { - 2 y - 35 }
B) 3y42y5\frac { - 3 y - 4 } { - 2 y - 5 }
C) y23y28y22y35- \frac { y ^ { 2 } - 3 y - 28 } { y ^ { 2 } - 2 y - 35 }
D) y+4y+5\frac { y + 4 } { y + 5 }
Question
Find the reciprocal.
11y\frac { 11 } { y }

A) y11\frac { y } { 11 }
B) 111y\frac { 1 } { 11 y }
C) 11y- \frac { 11 } { y }
D) 111y1 - \frac { 11 } { y }
Question
Find the reciprocal.
9y2+8y9 y ^ { 2 } + 8 y

A) 19y2+8y\frac { 1 } { 9 y ^ { 2 } + 8 y }
B) 9y28y\frac { 9 y ^ { 2 } } { 8 y }
C) 1(9y2+8y)1 - \left( 9 y ^ { 2 } + 8 y \right)
D) 8y2+9y8 y ^ { 2 } + 9 y
Question
Add, first finding the LCD. Simplify, if possible.
712+154\frac { 7 } { 12 } + \frac { 1 } { 54 }

A) 65108\frac { 65 } { 108 }
B) 433\frac { 4 } { 33 }
C) 6511\frac { 65 } { 11 }
D) 181\frac { 1 } { 81 }
Question
Divide and simplify.
x225x÷4x+20x5\frac { x ^ { 2 } - 25 } { x } \div \frac { 4 x + 20 } { x - 5 }

A) 4x(x5)2\frac { 4 x } { ( x - 5 ) ^ { 2 } }
B) (x5)24x\frac { ( x - 5 ) ^ { 2 } } { 4 x }
C) (x5)2x\frac { ( x - 5 ) ^ { 2 } } { x }
D) 4(x+5)2x\frac { 4 ( x + 5 ) ^ { 2 } } { x }
Question
Find the LCM.
50x5y,60x4y3,30x2y450 x ^ { 5 } y , 60 x ^ { 4 } y ^ { 3 } , 30 x ^ { 2 } y ^ { 4 }

A) 300x5y4300 x ^ { 5 } y ^ { 4 }
B) 60x5y60 x ^ { 5 } y
C) 150x20y12150 \mathrm { x } ^ { 20 } \mathrm { y } ^ { 12 }
D) 100x5y4100 x ^ { 5 } y ^ { 4 }
Question
Find the LCM.
54,12

A) 54
B) 18
C) 36
D) 108
Question
Divide and simplify.
4yx÷2xy\frac { 4 } { y - x } \div \frac { 2 } { x - y }

A) 2
B) 2(xy)yx\frac { 2 ( x - y ) } { y - x }
C) 2- 2
D) 4- 4
Question
Divide and simplify.
49÷72\frac { 4 } { 9 } \div \frac { 7 } { 2 }

A) 149\frac { 14 } { 9 }
B) 638\frac { 63 } { 8 }
C) 914\frac { 9 } { 14 }
D) 863\frac { 8 } { 63 }
Question
Divide and simplify.
2x24÷x312\frac { 2 x ^ { 2 } } { 4 } \div \frac { x ^ { 3 } } { 12 }

A) x524\frac { x ^ { 5 } } { 24 }
B) x6\frac { x } { 6 }
C) 6x2x3\frac { 6 x ^ { 2 } } { x ^ { 3 } }
D) 6x\frac { 6 } { x }
Question
Add, first finding the LCD. Simplify, if possible.
1112+59\frac { 11 } { 12 } + \frac { 5 } { 9 }

A) 1621\frac { 16 } { 21 }
B) 427\frac { 4 } { 27 }
C) 5336\frac { 53 } { 36 }
D) 537\frac { 53 } { 7 }
Question
Divide and simplify.
z2+8z+15z2+12z+35÷z2+3zz2+3z28\frac { z ^ { 2 } + 8 z + 15 } { z ^ { 2 } + 12 z + 35 } \div \frac { z ^ { 2 } + 3 z } { z ^ { 2 } + 3 z - 28 }

A) zz2+12z+35\frac { z } { z ^ { 2 } + 12 z + 35 }
B) z4z2+7z\frac { z - 4 } { z ^ { 2 } + 7 z }
C) z4z - 4
D) z4Z\frac { \mathrm { z } - 4 } { \mathrm { Z } }
Question
Find the LCM.
30,18,1530,18,15

A) 45
B) 30
C) 18
D) 90
Question
Find the LCM.
10,12,3010,12,30

A) 30
B) 60
C) 12
D) 20
Question
Divide and simplify.
18+6x18÷93x9\frac { - 18 + 6 x } { 18 } \div \frac { 9 - 3 x } { 9 }

A) x33x\frac { x - 3 } { 3 - x }
B) 1
C) x3x+3\frac { x - 3 } { x + 3 }
D) 1- 1
Question
Divide and simplify.
z2+7z+10z2+12z+35÷z2+2zz2+9z+14\frac { z ^ { 2 } + 7 z + 10 } { z ^ { 2 } + 12 z + 35 } \div \frac { z ^ { 2 } + 2 z } { z ^ { 2 } + 9 z + 14 }

A) z+2z + 2
B) z+2z2+7z\frac { z + 2 } { z ^ { 2 } + 7 z }
C) z+2z\frac { z + 2 } { z }
D) zz2+12z+35\frac { z } { z ^ { 2 } + 12 z + 35 }
Question
Add, first finding the LCD. Simplify, if possible.
45+49+14\frac { 4 } { 5 } + \frac { 4 } { 9 } + \frac { 1 } { 4 }

A) 12\frac { 1 } { 2 }
B) 26918\frac { 269 } { 18 }
C) 120\frac { 1 } { 20 }
D) 269180\frac { 269 } { 180 }
Question
Find the LCM.
500,900,450500,900,450

A) 1500
B) 2250
C) 4500
D) 900
Question
Divide and simplify.
a2+8a+12a24a+4÷a2+12a+36a2+5a+6\frac { a ^ { 2 } + 8 a + 12 } { a ^ { 2 } - 4 a + 4 } \div \frac { a ^ { 2 } + 12 a + 36 } { a ^ { 2 } + 5 a + 6 }

A) (a+2)2(a+3)(a2)2(a+6)\frac { ( a + 2 ) ^ { 2 } ( a + 3 ) } { ( a - 2 ) ^ { 2 } ( a + 6 ) }
B) (a+2)2(a+3)(a2)2\frac { ( a + 2 ) ^ { 2 } ( a + 3 ) } { ( a - 2 ) ^ { 2 } }
C) (a+6)3(a2)2(a+3)\frac { ( a + 6 ) ^ { 3 } } { ( a - 2 ) ^ { 2 } ( a + 3 ) }
D) a+3a+6- \frac { a + 3 } { a + 6 }
Question
Find the LCM.
72x,9x2,8x372 x , 9 x ^ { 2 } , 8 x ^ { 3 }

A) 72x272 x ^ { 2 }
B) 72x372 x ^ { 3 }
C) 72x572 x ^ { 5 }
D) 8x38 x ^ { 3 }
Question
Divide and simplify.
2p2p÷3p37p2\frac { 2 p - 2 } { p } \div \frac { 3 p - 3 } { 7 p ^ { 2 } }

A) 14p314p23p23p\frac { 14 p ^ { 3 } - 14 p ^ { 2 } } { 3 p ^ { 2 } - 3 p }
B) 14p3\frac { 14 p } { 3 }
C) 6p2+12p+67p3\frac { 6 p ^ { 2 } + 12 p + 6 } { 7 p ^ { 3 } }
D) 314p\frac { 3 } { 14 \mathrm { p } }
Question
Add, first finding the LCD. Simplify, if possible.
45+14\frac { 4 } { 5 } + \frac { 1 } { 4 }

A) 59\frac { 5 } { 9 }
B) 73\frac { 7 } { 3 }
C) 14\frac { 1 } { 4 }
D) 2120\frac { 21 } { 20 }
Question
Divide and simplify.
x2+9x+14x+7÷x247x14\frac { x ^ { 2 } + 9 x + 14 } { x + 7 } \div \frac { x ^ { 2 } - 4 } { 7 x - 14 }

A) 7
B) 17\frac { 1 } { 7 }
C) 7x14x2\frac { 7 x - 14 } { x - 2 }
D) (x+2)27\frac { ( x + 2 ) ^ { 2 } } { 7 }
Question
Add. Simplify, if possible.
m29mm3+18m3\frac { m ^ { 2 } - 9 m } { m - 3 } + \frac { 18 } { m - 3 }

A) m3m - 3
B) m29m+18m3\frac { m ^ { 2 } - 9 m + 18 } { m - 3 }
C) m+6m + 6
D) m6m - 6
Question
Find the LCM.
n,9+n,9n\mathrm { n } , 9 + \mathrm { n } , 9 - \mathrm { n }

A) 81n281 \mathrm { n } ^ { 2 }
B) n2+81n ^ { 2 } + 81
C) n+9n + 9
D) n(9+n)(9n)n ( 9 + n ) ( 9 - n )
Question
Add. Simplify, if possible.
215x+515x\frac { 2 } { 15 x } + \frac { 5 } { 15 x }

A) 715x\frac { 7 } { 15 x }
B) 730x\frac { 7 } { 30 x }
C) 15x7\frac { 15 x } { 7 }
D) 1
Question
Add. Simplify, if possible.
2x8+58x\frac { 2 } { x - 8 } + \frac { 5 } { 8 - x }

A) 7x8\frac { 7 } { x - 8 }
B) 3x8\frac { - 3 } { x - 8 }
C) 10x8\frac { 10 } { x - 8 }
D) 3x8\frac { 3 } { x - 8 }
Question
Add. Simplify, if possible.
13x8+383x\frac { 1 } { 3 x - 8 } + \frac { 3 } { 8 - 3 x }

A) 43x8\frac { 4 } { 3 x - 8 }
B) 23x8\frac { 2 } { 3 x - 8 }
C) 43x8\frac { - 4 } { 3 x - 8 }
D) 23x8\frac { - 2 } { 3 x - 8 }
Question
Find the LCM.
m23m,m27m+12m ^ { 2 } - 3 m , m ^ { 2 } - 7 m + 12

A) m(x+1)(m4)m ( x + 1 ) ( m - 4 )
B) (m+1)2( m + 1 ) ^ { 2 }
C) m(m+1)2m ( m + 1 ) ^ { 2 }
D) m(m3)(m4)m ( m - 3 ) ( m - 4 )
Question
Add. Simplify, if possible.
6mn2+8n2m\frac { 6 } { m - n ^ { 2 } } + \frac { 8 } { n ^ { 2 } - m }

A) 2mn2\frac { - 2 } { m - n ^ { 2 } }
B) 14mn2\frac { 14 } { m - n ^ { 2 } }
C) 48mn2\frac { 48 } { m - n ^ { 2 } }
D) 2mn2\frac { 2 } { m - n ^ { 2 } }
Question
Find the LCM.
r2+16r+64,r2+8rr ^ { 2 } + 16 r + 64 , r ^ { 2 } + 8 r

A) r(r+8)r ( r + 8 )
B) r(r+1)(r+8)r ( r + 1 ) ( r + 8 )
C) (r+8)2( r + 8 ) ^ { 2 }
D) r(r+8)2r ( r + 8 ) ^ { 2 }
Question
Add. Simplify, if possible.
99x2+39x2\frac { 9 } { 9 x ^ { 2 } } + \frac { 3 } { 9 x ^ { 2 } }

A) 4
B) 34x2\frac { 3 } { 4 x ^ { 2 } }
C) 43x2\frac { 4 } { 3 x ^ { 2 } }
D) 43x4\frac { 4 } { 3 x ^ { 4 } }
Question
Add. Simplify, if possible.
3x+32x5+28x5+2x\frac { 3 x + 3 } { 2 x - 5 } + \frac { 2 - 8 x } { - 5 + 2 x }

A) 5x+12x5\frac { 5 x + 1 } { 2 x - 5 }
B) 5x+54x10\frac { - 5 x + 5 } { 4 x - 10 }
C) 5x+52x5\frac { - 5 x + 5 } { 2 x - 5 }
D) 52x1- \frac { 5 } { 2 } x - 1
Question
Find the LCM.
x2+9x+20,x2+2x8x ^ { 2 } + 9 x + 20 , x ^ { 2 } + 2 x - 8

A) (x5)(x4)(x2)( x - 5 ) ( x - 4 ) ( x - 2 )
B) (x+4)(x2)( x + 4 ) ( x - 2 )
C) (x+5)(x+4)( x + 5 ) ( x + 4 )
D) (x+5)(x+4)(x2)( x + 5 ) ( x + 4 ) ( x - 2 )
Question
Find the LCM.
x2+11x+30,5x+25x ^ { 2 } + 11 x + 30,5 x + 25

A) 5(x6)(x5)5 ( x - 6 ) ( x - 5 )
B) 5(x+6)(x+5)5 ( x + 6 ) ( x + 5 )
C) 5(x6)(x+5)5 ( x - 6 ) ( x + 5 )
D) 5(x+6)(x5)5 ( x + 6 ) ( x - 5 )
Question
Find the LCM.
15xy,9x215 x y , 9 x ^ { 2 }

A) 45x2y45 x ^ { 2 } y
B) 45xy345 \mathrm { xy } ^ { 3 }
C) 45xy245 \mathrm { xy } ^ { 2 }
D) 45x3y45 \mathrm { x } ^ { 3 } \mathrm { y }
Question
Add. Simplify, if possible.
48+68\frac { 4 } { 8 } + \frac { 6 } { 8 }

A) 5
B) 52\frac { 5 } { 2 }
C) 45\frac { 4 } { 5 }
D) 54\frac { 5 } { 4 }
Question
Add. Simplify, if possible.
4x+y+3y+x\frac { 4 } { x + y } + \frac { 3 } { y + x }

A) 1x+y\frac { 1 } { x + y }
B) 72x+2y\frac { 7 } { 2 x + 2 y }
C) 4x+3y\frac { 4 } { x } + \frac { 3 } { y }
D) 7x+y\frac { 7 } { x + y }
Question
Find the LCM.
t,t7t , t - 7

A) t(t7)t ( t - 7 )
B) tt
C) 6
D) t7t - 7
Question
Add. Simplify, if possible.
31m+1m1\frac { 3 } { 1 - m } + \frac { 1 } { m - 1 }

A) 41m\frac { 4 } { 1 - m }
B) 21m\frac { - 2 } { 1 - \mathrm { m } }
C) 31m\frac { 3 } { 1 - m }
D) 21m\frac { 2 } { 1 - m }
Question
Find the LCM.
8a48,a26a8 a - 48 , a ^ { 2 } - 6 a

A) 8a2488 a ^ { 2 } - 48
B) 8a268 a ^ { 2 } - 6
C) 8a68 a - 6
D) 8a(a6)8 a ( a - 6 )
Question
Add. Simplify, if possible.
314x+910x2\frac { 3 } { 14 x } + \frac { 9 } { 10 x ^ { 2 } }

A) 10870x2\frac { 108 } { 70 x ^ { 2 } }
B) 3(5x+21)70x2\frac { 3 ( 5 x + 21 ) } { 70 x ^ { 2 } }
C) 12140x2\frac { 12 } { 140 x ^ { 2 } }
D) 1214x+10x2\frac { 12 } { 14 x + 10 x ^ { 2 } }
Question
Add. Simplify, if possible.
x+5x8+x38x+9(x+1)x8\frac { x + 5 } { x - 8 } + \frac { x - 3 } { 8 - x } + \frac { 9 ( x + 1 ) } { x - 8 }

A) 9x+9x8\frac { 9 x + 9 } { x - 8 }
B) 11x+11x8\frac { 11 x + 11 } { x - 8 }
C) 9x+17(x8)3\frac { 9 x + 17 } { ( x - 8 ) ^ { 3 } }
D) 9x+17x8\frac { 9 x + 17 } { x - 8 }
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Deck 6: Rational Expressions and Equations
1
Find all numbers for which the rational expression is not defined.
9b+8\frac { 9 } { b + 8 }

A) b=0b = 0
B) None
C) b=8b = - 8
D) b=8b = 8
C
2
Find all numbers for which the rational expression is not defined.
d52d\frac { d - 5 } { 2 - d }

A) d=2,5d = 2,5
B) d=2d = - 2
C) d=2d = 2
D) None
C
3
Multiply. Do not simplify.
x+5x+4x5x5\frac { x + 5 } { x + 4 } \cdot \frac { x - 5 } { x - 5 }

A) x+5(x+4)(x5)\frac { x + 5 } { ( x + 4 ) ( x - 5 ) }
B) (x+5)(x5)x+4\frac { ( x + 5 ) ( x - 5 ) } { x + 4 }
C) (x+4)(x5)(x+5)(x5)\frac { ( x + 4 ) ( x - 5 ) } { ( x + 5 ) ( x - 5 ) }
D) (x+5)(x5)(x+4)(x5)\frac { ( x + 5 ) ( x - 5 ) } { ( x + 4 ) ( x - 5 ) }
D
4
Multiply. Do not simplify.
3y23y29z8x\frac { 3 y ^ { 2 } } { 3 y ^ { 2 } } \cdot \frac { 9 z } { 8 x }

A) (3y2)(8x)(3y2)(9z)\frac { \left( 3 y ^ { 2 } \right) ( 8 x ) } { \left( 3 y ^ { 2 } \right) ( 9 z ) }
B) (3y2)(9z)8x\frac { \left( 3 y ^ { 2 } \right) ( 9 z ) } { 8 x }
C) (3y2)(9z)(3y2)(8x)\frac { \left( 3 y ^ { 2 } \right) ( 9 z ) } { \left( 3 y ^ { 2 } \right) ( 8 x ) }
D) 9z(3y2)(8x)\frac { 9 \mathrm { z } } { \left( 3 \mathrm { y } ^ { 2 } \right) ( 8 \mathrm { x } ) }
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5
Simplify.
1010x5x5\frac { 10 - 10 x } { 5 x - 5 }

A) 2
B) 10x1010 x - 10
C) 2- 2
D) 5x55 x - 5
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6
Find all numbers for which the rational expression is not defined.
x281x27x+12\frac { x ^ { 2 } - 81 } { x ^ { 2 } - 7 x + 12 }

A) x=0x = 0
B) x=9x = 9 and x=9x = - 9
C) x=3x = - 3 and x=4x = - 4
D) x=3x = 3 and x=4x = 4
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7
Simplify.
15x+39\frac { 15 x + 3 } { 9 }

A) 5x+13\frac { 5 x + 1 } { 3 }
В) 5x3\frac { 5 x } { 3 }
C) 5x+15 x + 1
D) 5x+19\frac { 5 x + 1 } { 9 }
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8
Multiply. Do not simplify.
3x3xx9x+3\frac { 3 x } { 3 x } \cdot \frac { x - 9 } { x + 3 }

A) 3x(x9)x+3\frac { 3 x ( x - 9 ) } { x + 3 }
B) x93x(x+3)\frac { x - 9 } { 3 x ( x + 3 ) }
C) 3x(x9)3x(x+3)\frac { 3 x ( x - 9 ) } { 3 x ( x + 3 ) }
D) 3x(x+3)3x(x9)\frac { 3 x ( x + 3 ) } { 3 x ( x - 9 ) }
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9
Find all numbers for which the rational expression is not defined.
2a9\frac { 2 } { a - 9 }

A) None
B) a=9a = 9
C) a=9a = - 9
D) a=0a = 0
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10
Multiply. Do not simplify.
2a+19a1aa\frac { 2 a + 1 } { 9 a - 1 } \cdot \frac { a } { a }

A) (2a+1)a(9a1)a\frac { ( 2 a + 1 ) a } { ( 9 a - 1 ) a }
B) (2a+1)a9a1\frac { ( 2 a + 1 ) a } { 9 a - 1 }
C) (9a1)a(2a+1)a\frac { ( 9 a - 1 ) a } { ( 2 a + 1 ) a }
D) 2a+1(9a1)a\frac { 2 a + 1 } { ( 9 a - 1 ) a }
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11
Find all numbers for which the rational expression is not defined.
x216x2+2x24\frac { x ^ { 2 } - 16 } { x ^ { 2 } + 2 x - 24 }

A) x=4x = - 4 and x=6x = 6
B) x=4x = 4 and x=4x = - 4
C) x=4x = 4 and x=6x = - 6
D) x=0x = 0
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12
Find all numbers for which the rational expression is not defined.
x225x22x35\frac { x ^ { 2 } - 25 } { x ^ { 2 } - 2 x - 35 }

A) x=5x = - 5 and x=7x = 7
B) x=5x = 5 and x=5x = - 5
C) x=5x = 5 and x=7x = - 7
D) x=0x = 0
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13
Find all numbers for which the rational expression is not defined.
8y4y216\frac { 8 y - 4 } { y ^ { 2 } - 16 }

A) y=12y = \frac { 1 } { 2 }
B) y=4y = 4
C) y=4y = 4 and y=4y = - 4
D) y=16y = 16
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14
Simplify.
15k35k\frac { 15 k ^ { 3 } } { 5 k }

A) 3k23 \mathrm { k } ^ { 2 }
B) 10
C) 3k3 k
D) 10k210 \mathrm { k } ^ { 2 }
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15
Simplify.
12m3p26m8p\frac { 12 m ^ { 3 } p ^ { 2 } } { 6 m ^ { 8 } p }

A) 2m5p22 m ^ { 5 } p ^ { 2 }
B) 2m5p\frac { 2 m ^ { 5 } } { p }
C) 2pm5\frac { 2 p } { m ^ { 5 } }
D) 2mp2 \mathrm { mp }
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16
Simplify.
9x245x15x275x\frac { 9 x ^ { 2 } - 45 x } { 15 x ^ { 2 } - 75 x }

A) 3
B) 53\frac { 5 } { 3 }
C) 35\frac { 3 } { 5 }
D) x55x25\frac { x - 5 } { 5 x - 25 }
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17
Find all numbers for which the rational expression is not defined.
c79\frac { c - 7 } { 9 }

A) None
B) c=7c = 7
C) c=7\mathrm { c } = - 7
D) c=0\mathrm { c } = 0
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18
Simplify.
2m2+2m6m2+8m\frac { 2 m ^ { 2 } + 2 m } { 6 m ^ { 2 } + 8 m }

A) m+13m+4\frac { m + 1 } { 3 m + 4 }
B) m+1m+4\frac { m + 1 } { m + 4 }
C) m+23m+4\frac { m + 2 } { 3 m + 4 }
D) m2+13m2+4\frac { m ^ { 2 } + 1 } { 3 m ^ { 2 } + 4 }
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19
Find all numbers for which the rational expression is not defined.
b66b24\frac { b - 6 } { 6 b - 24 }

A) b=24b = 24
B) b=0b = 0
C) b=4b = 4
D) b=6b = - 6
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20
Multiply. Do not simplify.
x48x11\frac { x - 4 } { 8 - x } \cdot \frac { - 1 } { - 1 }

A) (x4)(1)8x\frac { ( x - 4 ) ( - 1 ) } { 8 - x }
B) x4(8x)(1)\frac { x - 4 } { ( 8 - x ) ( - 1 ) }
C) (8x)(1)(x4)(1)\frac { ( 8 - x ) ( - 1 ) } { ( x - 4 ) ( - 1 ) }
D) (x4)(1)(8x)(1)\frac { ( x - 4 ) ( - 1 ) } { ( 8 - x ) ( - 1 ) }
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21
Find the reciprocal.
y2+8y+9y2y+11\frac { y ^ { 2 } + 8 y + 9 } { y ^ { 2 } - y + 11 }

A) y2+8y9y2y11\frac { y ^ { 2 } + 8 y - 9 } { y ^ { 2 } - y - 11 }
B) y2y+11y2+8y+9\frac { y ^ { 2 } - y + 11 } { y ^ { 2 } + 8 y + 9 }
C) y29y+8y2+y+11\frac { y ^ { 2 } - 9 y + 8 } { y ^ { 2 } + y + 11 }
D) y2y11y2+8y9\frac { y ^ { 2 } - y - 11 } { y ^ { 2 } + 8 y - 9 }
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22
Multiply and, if possible, simplify.
3p3p8p27p7\frac { 3 p - 3 } { p } \cdot \frac { 8 p ^ { 2 } } { 7 p - 7 }

A) 21p2+42p+218p3\frac { 21 p ^ { 2 } + 42 p + 21 } { 8 p ^ { 3 } }
B) 24p7\frac { 24 p } { 7 }
C) 24p324p27p27p\frac { 24 p ^ { 3 } - 24 p ^ { 2 } } { 7 p ^ { 2 } - 7 p }
D) 724p\frac { 7 } { 24 p }
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23
Multiply and, if possible, simplify.
k2+9k+20k2+12k+32k2+8kk2+10k+25\frac { k ^ { 2 } + 9 k + 20 } { k ^ { 2 } + 12 k + 32 } \cdot \frac { k ^ { 2 } + 8 k } { k ^ { 2 } + 10 k + 25 }

A) kk2+12k+32\frac { k } { k ^ { 2 } + 12 k + 32 }
B) kk+5\frac { \mathrm { k } } { \mathrm { k } + 5 }
C) k2+8kk+5\frac { k ^ { 2 } + 8 k } { k + 5 }
D) 1k+5\frac { 1 } { \mathrm { k } + 5 }
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24
Find the reciprocal.
x2\frac { x } { 2 }

A) 12x\frac { 1 } { 2 x }
B) 2x\frac { 2 } { x }
C) 1x21 - \frac { x } { 2 }
D) x2- \frac { x } { 2 }
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25
Simplify.
y2+6y16y2+17y+72\frac { y ^ { 2 } + 6 y - 16 } { y ^ { 2 } + 17 y + 72 }

A) 6y+1617y17\frac { 6 y + 16 } { 17 y - 17 }
B) y2+6y16y2+17y+72- \frac { y ^ { 2 } + 6 y - 16 } { y ^ { 2 } + 17 y + 72 }
C) 6y1617y+72\frac { 6 y - 16 } { 17 y + 72 }
D) y2y+9\frac { y - 2 } { y + 9 }
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26
Find the reciprocal.
2x2+y2\frac { 2 } { x ^ { 2 } + y ^ { 2 } }

A) x2+y22\frac { x ^ { 2 } + y ^ { 2 } } { 2 }
B) 2x2+y2- \frac { 2 } { x ^ { 2 } + y ^ { 2 } }
C) 12x2+y2\frac { 1 } { 2 x ^ { 2 } + y ^ { 2 } }
D) 12x2+2y2x\frac { 1 } { 2 x ^ { 2 } + 2 y ^ { 2 } x }
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27
Simplify.
y2+4y12y2+3y18\frac { y ^ { 2 } + 4 y - 12 } { y ^ { 2 } + 3 y - 18 }

A) y2+4y12y2+3y18- \frac { y ^ { 2 } + 4 y - 12 } { y ^ { 2 } + 3 y - 18 }
B) y2y3\frac { y - 2 } { y - 3 }
C) 4y23y3\frac { 4 y - 2 } { 3 y - 3 }
D) 4y123y18\frac { 4 y - 12 } { 3 y - 18 }
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28
Multiply and, if possible, simplify.
x41x481x2+9x2+1\frac { x ^ { 4 } - 1 } { x ^ { 4 } - 81 } \cdot \frac { x ^ { 2 } + 9 } { x ^ { 2 } + 1 }

A) x+1x3\frac { x + 1 } { x - 3 }
B) x1x+3\frac { x - 1 } { x + 3 }
C) x1x3\frac { x - 1 } { x - 3 }
D) (x+1)(x1)(x+3)(x3)\frac { ( x + 1 ) ( x - 1 ) } { ( x + 3 ) ( x - 3 ) }
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29
Multiply and, if possible, simplify.
k2+7k+12k2+10k+24k2+6kk23k18\frac { k ^ { 2 } + 7 k + 12 } { k ^ { 2 } + 10 k + 24 } \cdot \frac { k ^ { 2 } + 6 k } { k ^ { 2 } - 3 k - 18 }

A) k2+6kk6\frac { k ^ { 2 } + 6 k } { k - 6 }
B) kk6\frac { k } { k - 6 }
C) 1k6\frac { 1 } { k - 6 }
D) kk2+10k+24\frac { k } { k ^ { 2 } + 10 k + 24 }
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30
Find the reciprocal.
t+11t2\frac { t + 11 } { t - 2 }

A) t+2t11\frac { t + 2 } { t - 11 }
B) t11t+2\frac { t - 11 } { t + 2 }
C) t2t+11\frac { t - 2 } { t + 11 }
D) 11+t2t\frac { 11 + t } { 2 - t }
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31
Multiply and, if possible, simplify.
7x2540x3\frac { 7 x ^ { 2 } } { 5 } \cdot \frac { 40 } { x ^ { 3 } }

A) x528\frac { x ^ { 5 } } { 28 }
B) x28\frac { x } { 28 }
C) 56x\frac { 56 } { x }
D) 56x2x3\frac { 56 x ^ { 2 } } { x ^ { 3 } }
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32
Find the reciprocal.
x2+123x\frac { x ^ { 2 } + 12 } { 3 - x }

A) 3xx2+12\frac { 3 - x } { x ^ { 2 } + 12 }
B) x2+312x\frac { x ^ { 2 } + 3 } { 12 - x }
C) x2+12x3\frac { x ^ { 2 } + 12 } { x - 3 }
D) 12xx2+3\frac { 12 - x } { x ^ { 2 } + 3 }
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33
Multiply and, if possible, simplify.
x2x264x213x+40x25x\frac { x ^ { 2 } } { x ^ { 2 } - 64 } \cdot \frac { x ^ { 2 } - 13 x + 40 } { x ^ { 2 } - 5 x }

A) xx+8\frac { x } { x + 8 }
B) x(x+8)(x+5)\frac { x } { ( x + 8 ) ( x + 5 ) }
C) x2x+8\frac { x ^ { 2 } } { x + 8 }
D) xx8\frac { x } { x - 8 }
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34
Simplify.
y2+5yy2+6y\frac { y ^ { 2 } + 5 y } { y ^ { 2 } + 6 y }

A) y2+5yy+6\frac { y ^ { 2 } + 5 y } { y + 6 }
B) 7y+108y+12\frac { 7 y + 10 } { 8 y + 12 }
C) y+5y2+6y\frac { y + 5 } { y ^ { 2 } + 6 y }
D) y+5y+6\frac { y + 5 } { y + 6 }
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35
Simplify.
4x+220x2+18x+4\frac { 4 x + 2 } { 20 x ^ { 2 } + 18 x + 4 }

A) 4x+55x+18\frac { 4 x + 5 } { 5 x + 18 }
B) 15x+2\frac { 1 } { 5 x + 2 }
C) 4x5x+2\frac { 4 x } { 5 x + 2 }
D) 4x+220x2+18x+4\frac { 4 x + 2 } { 20 x ^ { 2 } + 18 x + 4 }
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36
Multiply and, if possible, simplify.
2z348z2\frac { 2 z ^ { 3 } } { 4 } \cdot \frac { 8 } { z ^ { 2 } }

A) 4z\frac { 4 } { \mathrm { z } }
B) 4z4 \mathrm { z }
C) z4\frac { z } { 4 }
D) 4z2z3\frac { 4 z ^ { 2 } } { z ^ { 3 } }
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37
Find the reciprocal.
x2+8xyy2x27xy+y2\frac { x ^ { 2 } + 8 x y - y ^ { 2 } } { x ^ { 2 } - 7 x y + y ^ { 2 } }

A) x2+7xy+y2x28xyy2\frac { x ^ { 2 } + 7 x y + y ^ { 2 } } { x ^ { 2 } - 8 x y - y ^ { 2 } }
B) 1x27xyy2\frac { 1 } { x ^ { 2 } - 7 x y - y ^ { 2 } }
C) x27xy+y2x2+8xyy2\frac { x ^ { 2 } - 7 x y + y ^ { 2 } } { x ^ { 2 } + 8 x y - y ^ { 2 } }
D) x28xy+y2x2+7xyy2\frac { x ^ { 2 } - 8 x y + y ^ { 2 } } { x ^ { 2 } + 7 x y - y ^ { 2 } }
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38
Simplify.
y23y28y22y35\frac { y ^ { 2 } - 3 y - 28 } { y ^ { 2 } - 2 y - 35 }

A) 3y282y35\frac { - 3 y - 28 } { - 2 y - 35 }
B) 3y42y5\frac { - 3 y - 4 } { - 2 y - 5 }
C) y23y28y22y35- \frac { y ^ { 2 } - 3 y - 28 } { y ^ { 2 } - 2 y - 35 }
D) y+4y+5\frac { y + 4 } { y + 5 }
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39
Find the reciprocal.
11y\frac { 11 } { y }

A) y11\frac { y } { 11 }
B) 111y\frac { 1 } { 11 y }
C) 11y- \frac { 11 } { y }
D) 111y1 - \frac { 11 } { y }
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40
Find the reciprocal.
9y2+8y9 y ^ { 2 } + 8 y

A) 19y2+8y\frac { 1 } { 9 y ^ { 2 } + 8 y }
B) 9y28y\frac { 9 y ^ { 2 } } { 8 y }
C) 1(9y2+8y)1 - \left( 9 y ^ { 2 } + 8 y \right)
D) 8y2+9y8 y ^ { 2 } + 9 y
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41
Add, first finding the LCD. Simplify, if possible.
712+154\frac { 7 } { 12 } + \frac { 1 } { 54 }

A) 65108\frac { 65 } { 108 }
B) 433\frac { 4 } { 33 }
C) 6511\frac { 65 } { 11 }
D) 181\frac { 1 } { 81 }
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42
Divide and simplify.
x225x÷4x+20x5\frac { x ^ { 2 } - 25 } { x } \div \frac { 4 x + 20 } { x - 5 }

A) 4x(x5)2\frac { 4 x } { ( x - 5 ) ^ { 2 } }
B) (x5)24x\frac { ( x - 5 ) ^ { 2 } } { 4 x }
C) (x5)2x\frac { ( x - 5 ) ^ { 2 } } { x }
D) 4(x+5)2x\frac { 4 ( x + 5 ) ^ { 2 } } { x }
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43
Find the LCM.
50x5y,60x4y3,30x2y450 x ^ { 5 } y , 60 x ^ { 4 } y ^ { 3 } , 30 x ^ { 2 } y ^ { 4 }

A) 300x5y4300 x ^ { 5 } y ^ { 4 }
B) 60x5y60 x ^ { 5 } y
C) 150x20y12150 \mathrm { x } ^ { 20 } \mathrm { y } ^ { 12 }
D) 100x5y4100 x ^ { 5 } y ^ { 4 }
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44
Find the LCM.
54,12

A) 54
B) 18
C) 36
D) 108
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45
Divide and simplify.
4yx÷2xy\frac { 4 } { y - x } \div \frac { 2 } { x - y }

A) 2
B) 2(xy)yx\frac { 2 ( x - y ) } { y - x }
C) 2- 2
D) 4- 4
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46
Divide and simplify.
49÷72\frac { 4 } { 9 } \div \frac { 7 } { 2 }

A) 149\frac { 14 } { 9 }
B) 638\frac { 63 } { 8 }
C) 914\frac { 9 } { 14 }
D) 863\frac { 8 } { 63 }
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47
Divide and simplify.
2x24÷x312\frac { 2 x ^ { 2 } } { 4 } \div \frac { x ^ { 3 } } { 12 }

A) x524\frac { x ^ { 5 } } { 24 }
B) x6\frac { x } { 6 }
C) 6x2x3\frac { 6 x ^ { 2 } } { x ^ { 3 } }
D) 6x\frac { 6 } { x }
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48
Add, first finding the LCD. Simplify, if possible.
1112+59\frac { 11 } { 12 } + \frac { 5 } { 9 }

A) 1621\frac { 16 } { 21 }
B) 427\frac { 4 } { 27 }
C) 5336\frac { 53 } { 36 }
D) 537\frac { 53 } { 7 }
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49
Divide and simplify.
z2+8z+15z2+12z+35÷z2+3zz2+3z28\frac { z ^ { 2 } + 8 z + 15 } { z ^ { 2 } + 12 z + 35 } \div \frac { z ^ { 2 } + 3 z } { z ^ { 2 } + 3 z - 28 }

A) zz2+12z+35\frac { z } { z ^ { 2 } + 12 z + 35 }
B) z4z2+7z\frac { z - 4 } { z ^ { 2 } + 7 z }
C) z4z - 4
D) z4Z\frac { \mathrm { z } - 4 } { \mathrm { Z } }
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50
Find the LCM.
30,18,1530,18,15

A) 45
B) 30
C) 18
D) 90
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51
Find the LCM.
10,12,3010,12,30

A) 30
B) 60
C) 12
D) 20
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52
Divide and simplify.
18+6x18÷93x9\frac { - 18 + 6 x } { 18 } \div \frac { 9 - 3 x } { 9 }

A) x33x\frac { x - 3 } { 3 - x }
B) 1
C) x3x+3\frac { x - 3 } { x + 3 }
D) 1- 1
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53
Divide and simplify.
z2+7z+10z2+12z+35÷z2+2zz2+9z+14\frac { z ^ { 2 } + 7 z + 10 } { z ^ { 2 } + 12 z + 35 } \div \frac { z ^ { 2 } + 2 z } { z ^ { 2 } + 9 z + 14 }

A) z+2z + 2
B) z+2z2+7z\frac { z + 2 } { z ^ { 2 } + 7 z }
C) z+2z\frac { z + 2 } { z }
D) zz2+12z+35\frac { z } { z ^ { 2 } + 12 z + 35 }
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54
Add, first finding the LCD. Simplify, if possible.
45+49+14\frac { 4 } { 5 } + \frac { 4 } { 9 } + \frac { 1 } { 4 }

A) 12\frac { 1 } { 2 }
B) 26918\frac { 269 } { 18 }
C) 120\frac { 1 } { 20 }
D) 269180\frac { 269 } { 180 }
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55
Find the LCM.
500,900,450500,900,450

A) 1500
B) 2250
C) 4500
D) 900
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56
Divide and simplify.
a2+8a+12a24a+4÷a2+12a+36a2+5a+6\frac { a ^ { 2 } + 8 a + 12 } { a ^ { 2 } - 4 a + 4 } \div \frac { a ^ { 2 } + 12 a + 36 } { a ^ { 2 } + 5 a + 6 }

A) (a+2)2(a+3)(a2)2(a+6)\frac { ( a + 2 ) ^ { 2 } ( a + 3 ) } { ( a - 2 ) ^ { 2 } ( a + 6 ) }
B) (a+2)2(a+3)(a2)2\frac { ( a + 2 ) ^ { 2 } ( a + 3 ) } { ( a - 2 ) ^ { 2 } }
C) (a+6)3(a2)2(a+3)\frac { ( a + 6 ) ^ { 3 } } { ( a - 2 ) ^ { 2 } ( a + 3 ) }
D) a+3a+6- \frac { a + 3 } { a + 6 }
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57
Find the LCM.
72x,9x2,8x372 x , 9 x ^ { 2 } , 8 x ^ { 3 }

A) 72x272 x ^ { 2 }
B) 72x372 x ^ { 3 }
C) 72x572 x ^ { 5 }
D) 8x38 x ^ { 3 }
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58
Divide and simplify.
2p2p÷3p37p2\frac { 2 p - 2 } { p } \div \frac { 3 p - 3 } { 7 p ^ { 2 } }

A) 14p314p23p23p\frac { 14 p ^ { 3 } - 14 p ^ { 2 } } { 3 p ^ { 2 } - 3 p }
B) 14p3\frac { 14 p } { 3 }
C) 6p2+12p+67p3\frac { 6 p ^ { 2 } + 12 p + 6 } { 7 p ^ { 3 } }
D) 314p\frac { 3 } { 14 \mathrm { p } }
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59
Add, first finding the LCD. Simplify, if possible.
45+14\frac { 4 } { 5 } + \frac { 1 } { 4 }

A) 59\frac { 5 } { 9 }
B) 73\frac { 7 } { 3 }
C) 14\frac { 1 } { 4 }
D) 2120\frac { 21 } { 20 }
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60
Divide and simplify.
x2+9x+14x+7÷x247x14\frac { x ^ { 2 } + 9 x + 14 } { x + 7 } \div \frac { x ^ { 2 } - 4 } { 7 x - 14 }

A) 7
B) 17\frac { 1 } { 7 }
C) 7x14x2\frac { 7 x - 14 } { x - 2 }
D) (x+2)27\frac { ( x + 2 ) ^ { 2 } } { 7 }
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61
Add. Simplify, if possible.
m29mm3+18m3\frac { m ^ { 2 } - 9 m } { m - 3 } + \frac { 18 } { m - 3 }

A) m3m - 3
B) m29m+18m3\frac { m ^ { 2 } - 9 m + 18 } { m - 3 }
C) m+6m + 6
D) m6m - 6
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62
Find the LCM.
n,9+n,9n\mathrm { n } , 9 + \mathrm { n } , 9 - \mathrm { n }

A) 81n281 \mathrm { n } ^ { 2 }
B) n2+81n ^ { 2 } + 81
C) n+9n + 9
D) n(9+n)(9n)n ( 9 + n ) ( 9 - n )
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63
Add. Simplify, if possible.
215x+515x\frac { 2 } { 15 x } + \frac { 5 } { 15 x }

A) 715x\frac { 7 } { 15 x }
B) 730x\frac { 7 } { 30 x }
C) 15x7\frac { 15 x } { 7 }
D) 1
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64
Add. Simplify, if possible.
2x8+58x\frac { 2 } { x - 8 } + \frac { 5 } { 8 - x }

A) 7x8\frac { 7 } { x - 8 }
B) 3x8\frac { - 3 } { x - 8 }
C) 10x8\frac { 10 } { x - 8 }
D) 3x8\frac { 3 } { x - 8 }
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65
Add. Simplify, if possible.
13x8+383x\frac { 1 } { 3 x - 8 } + \frac { 3 } { 8 - 3 x }

A) 43x8\frac { 4 } { 3 x - 8 }
B) 23x8\frac { 2 } { 3 x - 8 }
C) 43x8\frac { - 4 } { 3 x - 8 }
D) 23x8\frac { - 2 } { 3 x - 8 }
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66
Find the LCM.
m23m,m27m+12m ^ { 2 } - 3 m , m ^ { 2 } - 7 m + 12

A) m(x+1)(m4)m ( x + 1 ) ( m - 4 )
B) (m+1)2( m + 1 ) ^ { 2 }
C) m(m+1)2m ( m + 1 ) ^ { 2 }
D) m(m3)(m4)m ( m - 3 ) ( m - 4 )
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67
Add. Simplify, if possible.
6mn2+8n2m\frac { 6 } { m - n ^ { 2 } } + \frac { 8 } { n ^ { 2 } - m }

A) 2mn2\frac { - 2 } { m - n ^ { 2 } }
B) 14mn2\frac { 14 } { m - n ^ { 2 } }
C) 48mn2\frac { 48 } { m - n ^ { 2 } }
D) 2mn2\frac { 2 } { m - n ^ { 2 } }
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68
Find the LCM.
r2+16r+64,r2+8rr ^ { 2 } + 16 r + 64 , r ^ { 2 } + 8 r

A) r(r+8)r ( r + 8 )
B) r(r+1)(r+8)r ( r + 1 ) ( r + 8 )
C) (r+8)2( r + 8 ) ^ { 2 }
D) r(r+8)2r ( r + 8 ) ^ { 2 }
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69
Add. Simplify, if possible.
99x2+39x2\frac { 9 } { 9 x ^ { 2 } } + \frac { 3 } { 9 x ^ { 2 } }

A) 4
B) 34x2\frac { 3 } { 4 x ^ { 2 } }
C) 43x2\frac { 4 } { 3 x ^ { 2 } }
D) 43x4\frac { 4 } { 3 x ^ { 4 } }
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70
Add. Simplify, if possible.
3x+32x5+28x5+2x\frac { 3 x + 3 } { 2 x - 5 } + \frac { 2 - 8 x } { - 5 + 2 x }

A) 5x+12x5\frac { 5 x + 1 } { 2 x - 5 }
B) 5x+54x10\frac { - 5 x + 5 } { 4 x - 10 }
C) 5x+52x5\frac { - 5 x + 5 } { 2 x - 5 }
D) 52x1- \frac { 5 } { 2 } x - 1
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71
Find the LCM.
x2+9x+20,x2+2x8x ^ { 2 } + 9 x + 20 , x ^ { 2 } + 2 x - 8

A) (x5)(x4)(x2)( x - 5 ) ( x - 4 ) ( x - 2 )
B) (x+4)(x2)( x + 4 ) ( x - 2 )
C) (x+5)(x+4)( x + 5 ) ( x + 4 )
D) (x+5)(x+4)(x2)( x + 5 ) ( x + 4 ) ( x - 2 )
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72
Find the LCM.
x2+11x+30,5x+25x ^ { 2 } + 11 x + 30,5 x + 25

A) 5(x6)(x5)5 ( x - 6 ) ( x - 5 )
B) 5(x+6)(x+5)5 ( x + 6 ) ( x + 5 )
C) 5(x6)(x+5)5 ( x - 6 ) ( x + 5 )
D) 5(x+6)(x5)5 ( x + 6 ) ( x - 5 )
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73
Find the LCM.
15xy,9x215 x y , 9 x ^ { 2 }

A) 45x2y45 x ^ { 2 } y
B) 45xy345 \mathrm { xy } ^ { 3 }
C) 45xy245 \mathrm { xy } ^ { 2 }
D) 45x3y45 \mathrm { x } ^ { 3 } \mathrm { y }
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74
Add. Simplify, if possible.
48+68\frac { 4 } { 8 } + \frac { 6 } { 8 }

A) 5
B) 52\frac { 5 } { 2 }
C) 45\frac { 4 } { 5 }
D) 54\frac { 5 } { 4 }
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75
Add. Simplify, if possible.
4x+y+3y+x\frac { 4 } { x + y } + \frac { 3 } { y + x }

A) 1x+y\frac { 1 } { x + y }
B) 72x+2y\frac { 7 } { 2 x + 2 y }
C) 4x+3y\frac { 4 } { x } + \frac { 3 } { y }
D) 7x+y\frac { 7 } { x + y }
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76
Find the LCM.
t,t7t , t - 7

A) t(t7)t ( t - 7 )
B) tt
C) 6
D) t7t - 7
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77
Add. Simplify, if possible.
31m+1m1\frac { 3 } { 1 - m } + \frac { 1 } { m - 1 }

A) 41m\frac { 4 } { 1 - m }
B) 21m\frac { - 2 } { 1 - \mathrm { m } }
C) 31m\frac { 3 } { 1 - m }
D) 21m\frac { 2 } { 1 - m }
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78
Find the LCM.
8a48,a26a8 a - 48 , a ^ { 2 } - 6 a

A) 8a2488 a ^ { 2 } - 48
B) 8a268 a ^ { 2 } - 6
C) 8a68 a - 6
D) 8a(a6)8 a ( a - 6 )
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79
Add. Simplify, if possible.
314x+910x2\frac { 3 } { 14 x } + \frac { 9 } { 10 x ^ { 2 } }

A) 10870x2\frac { 108 } { 70 x ^ { 2 } }
B) 3(5x+21)70x2\frac { 3 ( 5 x + 21 ) } { 70 x ^ { 2 } }
C) 12140x2\frac { 12 } { 140 x ^ { 2 } }
D) 1214x+10x2\frac { 12 } { 14 x + 10 x ^ { 2 } }
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80
Add. Simplify, if possible.
x+5x8+x38x+9(x+1)x8\frac { x + 5 } { x - 8 } + \frac { x - 3 } { 8 - x } + \frac { 9 ( x + 1 ) } { x - 8 }

A) 9x+9x8\frac { 9 x + 9 } { x - 8 }
B) 11x+11x8\frac { 11 x + 11 } { x - 8 }
C) 9x+17(x8)3\frac { 9 x + 17 } { ( x - 8 ) ^ { 3 } }
D) 9x+17x8\frac { 9 x + 17 } { x - 8 }
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