Question 1

2s + 6 + 20t

Accepted Answer

A)  20(s + 3 + t) 
B)  2(s + 6 + 10t) 
C)  2(s + 6 + 20t) 
D)  2(s + 3 + 10t)

Question 2

Evaluate the expression for the given value of x.
- , x = -4

Accepted Answer

A)  128 
B)  -128 
C)  -24 
D)  -512

Question 3

Divide, if possible.
-

Accepted Answer

A)   
B)  25 
C)  -35 
D)  -25

Question 4

Add. Do not use a number line except as a check.
--1.2 + (-4.6) + 3.3

Accepted Answer

A)  0.1 
B)  -2.5 
C)  -9.1 
D)  6.7

Question 5

Write an equivalent expression. Use an associative law.
-(5 + u) + v

Accepted Answer

A)  (5 + v) + u 
B)  (u + 5) + v 
C)  5 + (u + v) 
D)  v + (5 + u)

Question 6

Substitute to find the value of the expression.
-A train must cover a distance of 2140 miles. The velocity, in miles per hour, of the train is  where t is the time, in hours, to complete the trip. If the train completes the trip in 20 hours, what is its velocity?

Accepted Answer

A)  102 mph 
B)  0.01 mph 
C)  107 mph 
D)  42,800 mph

Question 7

Multiply.
--0.3 · (-0.2)

Accepted Answer

A)  0.1 
B)  -0.5 
C)  -0.4 
D)  0.06

Question 8

Find the reciprocal, if it exists.
--4

Accepted Answer

A)   
B)   
C)  4 
D)  0

Question 9

Multiply.
--3.4 · (-15)

Accepted Answer

A)  -18.4 
B)  51 
C)  -11.6 
D)  18.4

Question 10

Convert to decimal notation.
-

Accepted Answer

A)  -3 
B)  0.33333333 
C)   
D)

Question 11

Add. Do not use a number line except as a check.
-

Accepted Answer

A)   
B)   
C)  -62 
D)  - 8

Question 12

Evaluate.
-5x, when x = 4

Accepted Answer

A)  9 
B)  23 
C)  20 
D)  90

Question 13

Solve the problem.
-In Smithville, there were 242 teachers in 1990 and 321 teachers in 2000. Find the percent of increase in the number of teachers in Smithville during this time period. Round to the nearest tenth of a percent.

Accepted Answer

A)  39.2% 
B)  24.6% 
C)  32.6% 
D)  35.9%

Question 14

Multiply.
--5.9(6.2x - 2.3y - 1.2)

Accepted Answer

A)  -36.58x + 13.57y - 1.2 
B)  -36.58x - 13.57y - 7.08 
C)  -36.58x + 13.57y + 7.08 
D)  -36.58x - 2.3y - 1.2

Question 15

Simplify.
-3 + (-17) - (-19) - 2 + 8

Accepted Answer

A)  -5 
B)  15 
C)  11 
D)  -23

Question 16

Divide.
-

Accepted Answer

A)  1 
B)   
C)   
D)  -1

Question 17

Add. Do not use a number line except as a check.
-377 + (-87) + 31 + (-119) + (-26) + 367

Accepted Answer

A)  543 
B)  -1007 
C)  595 
D)  -543

Question 18

Multiply.
--2 ·(-0.2) ·8

Accepted Answer

A)  -32 
B)  32 
C)  3.2 
D)  -3.2

Question 19

Find the opposite, or additive inverse.
-

Accepted Answer

A)  8 
B)   
C)   
D)  -8

Question 20

Subtract.
-7 - 19

Accepted Answer

A)  -26 
B)  -12 
C)  26 
D)  12

Exam 2: Introduction to Real Numbers and Algebraic Expressions

2s + 6 + 20t

Evaluate the expression for the given value of x. - , x = -4

Divide, if possible. -

Add. Do not use a number line except as a check. --1.2 + (-4.6) + 3.3

Write an equivalent expression. Use an associative law. -(5 + u) + v

Substitute to find the value of the expression. -A train must cover a distance of 2140 miles. The velocity, in miles per hour, of the train is where t is the time, in hours, to complete the trip. If the train completes the trip in 20 hours, what is its velocity?

Multiply. --0.3 · (-0.2)

Find the reciprocal, if it exists. --4

Multiply. --3.4 · (-15)

Convert to decimal notation. -

Add. Do not use a number line except as a check. -

Evaluate. -5x, when x = 4

Solve the problem. -In Smithville, there were 242 teachers in 1990 and 321 teachers in 2000. Find the percent of increase in the number of teachers in Smithville during this time period. Round to the nearest tenth of a percent.

Multiply. --5.9(6.2x - 2.3y - 1.2)

Simplify. -3 + (-17) - (-19) - 2 + 8

Divide. -

Add. Do not use a number line except as a check. -377 + (-87) + 31 + (-119) + (-26) + 367

Multiply. --2 ·(-0.2) ·8

Find the opposite, or additive inverse. -

Subtract. -7 - 19