Chapter 2

Evaluate the expression. $$|-6.1|-6.01$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ -12 y+5 y $$

Find the sum. $$ -7+(-8)+(-9) $$

Evaluate the expression for the given value of x. $$9+x+(-8)+(-3) ; x=-12$$

Evaluate the expression. \(12-(-8)-5\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$(-7.39)(4.41)(-2.9)$$

Simplify the expression. $$\frac{-56+x}{-8}$$

Evaluate the expression. $$ \frac{7}{12}-\left(-\frac{3}{4}\right)+\left(-\frac{1}{8}\right) $$

Use mental math to solve the equation. $$|x|=4$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ -8 b-9 b $$

Find the sum. $$ -1+(-1)+(-1) $$

GAME In the game that decides the high school football championship, your team needs to gain 14 yards to score a touchdown and win. Your team's final four plays result in a 9-yard gain, a 5 -yard loss, a 4 -yard gain, and a 5 -yard gain as time runs out. Use a number line to model the gains and losses. Did your team win?

Evaluate the expression. \(20+(-17)-8\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$(4.67)(-8.01)(1.89)$$

Simplify the expression. $$\frac{45-5 x}{5}$$

Find the terms of the expression. $$ -4-y $$

Use mental math to solve the equation. $$|x|=0$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ 5-x+2 $$

Find the sum. $$ -4+(-4)+(-4) $$

Evaluate the expression. \(-17+25-34\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$(3.6)(-2.67)^{3}(-9.41)$$

Evaluate the expression for the given value(s) of the variable(s). $$\frac{x-5}{6} \text { when } x=30$$

Find the terms of the expression. $$ -x-7 $$

Use mental math to solve the equation. $$x=|-3.8|$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ -3+y+7 $$

Evaluate the expression. \(-6.3+4.1-9.5\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$(-6.3)^{2}(9.5)(4.8)$$

Evaluate the expression for the given value(s) of the variable(s). $$\frac{3 r-7}{11} \text { when } r=17$$

Find the terms of the expression. $$ -3 x+6 $$

Use mental math to solve the equation. $$|-x|=1$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ 4+a+a $$

You do not need to know the number of neutrons in an atom to find its total charge. Explain why not. Which property of addition supports your answer?

Evaluate the expression. \(2-11+5-(-16)\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$x^{3}-8.29 \text { when } x=-2.47$$

Evaluate the expression for the given value(s) of the variable(s). $$\frac{3 a-b}{a} \text { when } a=\frac{1}{3} \text { and } b=-3$$

Find the terms of the expression. \(9-28 x\)

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ 1.3 t-2.1 t $$

Find the terms of the expression. $$ -9+4 b $$

A pest control company had a profit of \(\$ 3,514.65\) in April, a profit of \(\$ 5,674.25\) in May, a loss of \(\$ 8,992.88\) in June, and a loss of \(\$ 1,207.03\) in July. Did the company make a profit during the 4 -month period? Explain.

Evaluate the expression. \(-29.4-(-8)+4\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$8.3+y^{3} \text { when } y=-4.6$$

Evaluate the expression for the given value(s) of the variable(s). $$\frac{15 x^{2}+10}{y} \text { when } x=-3 \text { and } y=\frac{2}{3}$$

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ \frac{7}{9} w+\left(-\frac{2}{3}\right) w $$

Find the terms of the expression. $$ a+3 b-5 $$

Evaluate the expression. \(\frac{1}{2}+\left(-\frac{4}{5}\right)-\frac{2}{3}\)

Use a calculator to evaluate the expression. Round your answer to two decimal places. $$4.7 b-\left(-b^{2}\right) \text { when } b=1.99$$

Evaluate the expression for the given value(s) of the variable(s). $$\frac{28-4 x}{y} \text { when } x=2 \text { and } y=\frac{1}{2}$$

Decide whether the statement is true or false. If it is false, give a counter example. The opposite of \(|a|\) is never positive.

SIMPLIFYING EXPRESSIONS Simplify the expression by combining like terms. $$ 107 a-208 a $$

Find the terms of the expression. $$ x-y-7$$