91Ó°ÊÓ

Multiply. $$ 9 \cdot(-5) $$

Find the opposite, or additive inverse. $$ 39 $$

Find the opposite, or additive inverse. $$ -17 $$

Label each of the following numbers as prime, composite, or neither. $$ 4 $$

Use the commutative law of multiplication to write an equivalent expression. $$ 2 \cdot a $$

Graph each rational number on the number line. $$ 3.87 $$

Simplify. $$ (-1)^{7} $$

Graph each rational number on the number line. $$ -\frac{17}{5} $$

Simplify. $$ -2^{5} $$

Write decimal notation for each number. $$ \frac{7}{8} $$