Question 1

Subtract. Simplify, if possible.
-

Accepted Answer

A)   
B)  0 
C)   
D)

Question 2

Find an equation of variation in which y varies inversely as x and the following is true.
-y = 21, when x = 3

Accepted Answer

A)  y = 7x 
B)   
C)   
D)

Question 3

Find the LCM.
-t , t - 7

Accepted Answer

A)  t(t - 7 ) 
B)  t 
C)  6 
D)  t - 7

Question 4

Find an equation of variation in which the following are true.
-y varies directly as the square of x, and y = 5.6 when x = 4.

Accepted Answer

A)   
B)   
C)   
D)

Question 5

Add. Simplify, if possible.
-

Accepted Answer

A)   
B)   
C)   
D)

Question 6

Solve the equation.
-

Accepted Answer

A)   
B)   
C)  - 4 
D)  4

Question 7

Simplify.
-

Accepted Answer

A)   
B)  -1 
C)  1 
D)

Question 8

Divide and simplify.
-

Accepted Answer

A)   
B)   
C)   
D)

Question 9

Solve.
-The speed of a vehicle is inversely proportional to the time it takes to travel a fixed distance. If a vehicle travels a fixed distance at 60 miles per hour in 50 minutes, how fast must it travel to cover the same distance in 10
Minutes?

Accepted Answer

A)   
B)  12 miles per hour 
C)   
D)  300 miles per hour

Question 10

Find an equation of variation in which the following are true.
-f varies jointly as  and h, and f = 144 when q = 4 and h = 3.

Accepted Answer

A)   
B)   
C)   
D)

Question 11

Find the LCM.
-10, 12, 30

Accepted Answer

A)  30 
B)  60 
C)  12 
D)  20

Question 12

Find an equation of variation in which y varies inversely as x and the following is true.
-y = 10, when x = 19

Accepted Answer

A)   
B)  y = 190x 
C)   
D)

Question 13

Solve the equation.
-

Accepted Answer

A)  1 
B)  2 
C)   
D)

Question 14

Find all numbers for which the rational expression is not defined.
-

Accepted Answer

A)  b = 0 
B)  None 
C)  b = -8 
D)  b = 8

Question 15

Simplify.
-

Accepted Answer

A)   
B)   
C)   
D)  1

Question 16

Multiply and, if possible, simplify.
-

Accepted Answer

A)   
B)   
C)   
D)

Question 17

Simplify.
-

Accepted Answer

A)   
B)   
C)   
D)

Question 18

Solve the problem.
-A contractor finds that it takes Sam Tockett 11 hours to construct a wall of a certain size. It takes Jim Lowell 8 hours to construct the same wall. How long would it take if they worked together?

Accepted Answer

A)  19 hours 
B)   
C)  1 hour 
D)

Question 19

Find all numbers for which the rational expression is not defined.
-

Accepted Answer

A)   
B)  y = 4 
C)  y = 4 and y = -4 
D)  y = 16

Question 20

Add, first finding the LCD. Simplify, if possible.
-

Accepted Answer

A)   
B)   
C)   
D)

Exam 7: Rational Expressions and Equations

Subtract. Simplify, if possible. -

Find an equation of variation in which y varies inversely as x and the following is true. -y = 21, when x = 3

Find the LCM. -t , t - 7

Find an equation of variation in which the following are true. -y varies directly as the square of x, and y = 5.6 when x = 4.

Add. Simplify, if possible. -

Solve the equation. -

Simplify. -

Divide and simplify. -

Solve. -The speed of a vehicle is inversely proportional to the time it takes to travel a fixed distance. If a vehicle travels a fixed distance at 60 miles per hour in 50 minutes, how fast must it travel to cover the same distance in 10 Minutes?

Find an equation of variation in which the following are true. -f varies jointly as and h, and f = 144 when q = 4 and h = 3.

Find the LCM. -10, 12, 30

Find an equation of variation in which y varies inversely as x and the following is true. -y = 10, when x = 19

Solve the equation. -

Find all numbers for which the rational expression is not defined. -

Simplify. -

Multiply and, if possible, simplify. -

Simplify. -

Solve the problem. -A contractor finds that it takes Sam Tockett 11 hours to construct a wall of a certain size. It takes Jim Lowell 8 hours to construct the same wall. How long would it take if they worked together?

Find all numbers for which the rational expression is not defined. -

Add, first finding the LCD. Simplify, if possible. -