Question 1

Evaluate $-x$ for the given value of $x$.
-$\mathrm{x}=-2.5$

Accepted Answer

A)  0 
B)  $-\frac{1}{2.5}$ 
C)  -2.5 
D)  2.5

Question 2

Multiply.
-$30 \cdot(-1.2) \cdot 3 \cdot(-0.08)$

Accepted Answer

A)  -86.4 
B)  -8.64 
C)  86.4 
D)  8.64

Question 3

Write an equivalent expression. Use an associative law.
-$r+(9+s)$

Accepted Answer

A)  $(9+s)+r$ 
B)  $r(9+s)$ 
C)  $(r+9)+s$ 
D)  $r+(s+9)$

Question 4

Insert \) to write a true statement.
-1----------- 0

Accepted Answer

A)  $10$

Question 5

Solve the problem.
-Approximately 0.235 of parents enforce a bedtime before 8:30 P.M. for children under age 8 and 0.35 of parents enforce a bedtime before 10:30 P.M. for children over age 13. Express these decimals as percents.

Accepted Answer

A)  $23.5 \%$; $35 \%$ 
B)  $235 \% ; 350 \%$ 
C)  $2.35 \%$; $3.5 \%$ 
D)  $23.5 \%$; $3.5 \%$

Question 6

Add. Do not use a number line except as a check.
-$-1.8+(-4.3)+3.5$

Accepted Answer

A)  -2.6 
B)  6 
C)  -1 
D)  -9.6

Question 7

Evaluate - (-x) for the given value of x.
-$\mathrm{x}=1.71$

Accepted Answer

A)  1.71 
B)  -1.71 
C)  171 
D)  $\frac{171}{10}$

Question 8

Add. Do not use a number line except as a check.
-$-9.5+5.2$

Accepted Answer

A)  14.7 
B)  4.3 
C)  -4.3 
D)  -14.7

Question 9

Convert to fractional notation. Do not simplify.
-4.9

Accepted Answer

A)  $\frac{1}{49}$ 
B)  $\frac{49}{10}$ 
C)  $\frac{98}{100}$ 
D)  $\frac{98}{10}$

Question 10

Round to the requested decimal place.
-62.8761 (nearest thousandth)

Accepted Answer

A)  62.886 
B)  62.866 
C)  62.876

Question 11

Factor. Check by multiplying.
-$3 m-9 n+6$

Accepted Answer

A)  $3(m-3 n+2)$ 
B)  $3(m-9 n+6)$ 
C)  $3(m-3 n+6)$ 
D)  $9(3 m-n+6)$

Question 12

Find the absolute value.
-$\left|-\frac{1}{3}\right|$

Accepted Answer

A)  $-\frac{1}{3}$ 
B)  $\frac{1}{3}$ 
C)  $\frac{2}{3}$ 
D)  0

Question 13

Remove parentheses and simplify.
-$-7(4 r+3)+7(6 r+5)$

Accepted Answer

A)  $14 r+14$ 
B)  $-49 r$ 
C)  $-3 r-4$ 
D)  $14 r+3$

Question 14

Simplify.
-$-\frac{32 t}{24 t}$

Accepted Answer

A)  $-\frac{4 \mathrm{t}}{3}$ 
B)  $\frac{4}{3}$ 
C)  $\frac{4 \mathrm{t}}{3}$ 
D)  $-\frac{4}{3}$

Question 15

Round to the requested decimal place.
-4.944 (nearest tenth)

Accepted Answer

A)  4.8 
B)  5 
C)  4.9

Question 16

Convert to decimal notation.
-$0.6 \%$

Accepted Answer

A)  0.006 
B)  0.6 
C)  6 
D)  0.06

Question 17

Divide.
-

Accepted Answer

A)  95 
B)  84 
C)  9.5 
D)  96

Question 18

Subtract.
-$-182-(-510)$

Accepted Answer

A)  -692 
B)  -328 
C)  328 
D)  692

Question 19

Find the opposite, or additive inverse.
-23

Accepted Answer

A)  23 
B)  -23 
C)  $\frac{1}{23}$ 
D)  0

Question 20

Use the commutative and/or associative laws to rewrite the given expression. Label each step with a reason.
-$(\mathrm{x}+2)+\mathrm{y}$ as $2+(\mathrm{x}+\mathrm{y})$

Accepted Answer

The answer of Use the commutative and/or associative laws to...

Exam 1: Introduction to Real Numbers and Algebraic Expressions

Evaluate $-x$ for the given value of $x$ . - $\mathrm{x}=-2.5$

Multiply. - $30 \cdot(-1.2) \cdot 3 \cdot(-0.08)$

Write an equivalent expression. Use an associative law. - $r+(9+s)$

Insert < or $>$ to write a true statement. -1----------- 0

Solve the problem. -Approximately 0.235 of parents enforce a bedtime before 8:30 P.M. for children under age 8 and 0.35 of parents enforce a bedtime before 10:30 P.M. for children over age 13. Express these decimals as percents.

Add. Do not use a number line except as a check. - $-1.8+(-4.3) +3.5$

Evaluate - (-x) for the given value of x. - $\mathrm{x}=1.71$

Add. Do not use a number line except as a check. - $-9.5+5.2$

Convert to fractional notation. Do not simplify. -4.9

Round to the requested decimal place. -62.8761 (nearest thousandth)

Factor. Check by multiplying. - $3 m-9 n+6$

Find the absolute value. - $\left|-\frac{1}{3}\right|$

Remove parentheses and simplify. - $-7(4 r+3) +7(6 r+5)$

Simplify. - $-\frac{32 t}{24 t}$

Round to the requested decimal place. -4.944 (nearest tenth)

Convert to decimal notation. - $0.6 \%$

Divide. -

Subtract. - $-182-(-510)$

Find the opposite, or additive inverse. -23

Use the commutative and/or associative laws to rewrite the given expression. Label each step with a reason. - $(\mathrm{x}+2)+\mathrm{y}$ as $2+(\mathrm{x}+\mathrm{y})$

Exam 1: Introduction to Real Numbers and Algebraic Expressions

Evaluate −x-x−x for the given value of xxx . - x=−2.5\mathrm{x}=-2.5x=−2.5

Multiply. - 30⋅(−1.2) ⋅3⋅(−0.08) 30 \cdot(-1.2) \cdot 3 \cdot(-0.08) 30⋅(−1.2) ⋅3⋅(−0.08)

Write an equivalent expression. Use an associative law. - r+(9+s) r+(9+s) r+(9+s)

Insert < or >>> to write a true statement. -1----------- 0

Solve the problem. -Approximately 0.235 of parents enforce a bedtime before 8:30 P.M. for children under age 8 and 0.35 of parents enforce a bedtime before 10:30 P.M. for children over age 13. Express these decimals as percents.

Add. Do not use a number line except as a check. - −1.8+(−4.3) +3.5-1.8+(-4.3) +3.5−1.8+(−4.3) +3.5

Evaluate - (-x) for the given value of x. - x=1.71\mathrm{x}=1.71x=1.71

Add. Do not use a number line except as a check. - −9.5+5.2-9.5+5.2−9.5+5.2