91Ó°ÊÓ

Find the sum or difference. (p. 749)

$7.3-2.1$

Evaluate the expression when $a=-2\text{and}b=-13$.

localid="1648800258866" $\left|-a\right|$

Evaluate the expression when $x=6\text{and}y=12$. (Lesson 1.3)

localid="1649147546197" $\frac{x+y}{3}$

Absolute value bars are grouping symbols. Use the order of operations to evaluate the expression– 3 +|– x + 2| when x = 12.

Use the coordinate plane shown in the example. Give the coordinates of the point.

59.

Evaluate the expression $3∙8+5∙4$

Write the power in words and as a repeated multiplication. Then evaluate the power.

$2^7$

Plot the point in a coordinate plane. Describe the location of the point.

Plot the point in a coordinate plane. Describe the location of the point.

Evaluate the expression when m= 3.

m³