## Introductory Algebra for College Students (7th Edition)

$-45$
The product of two numbers with different signs can be found by performing the following steps: (1) Multiply their absolute values. $|5| \cdot |-9| = 5 \cdot 9 = 45$ (2) The product is negative. $5(-9) = -45$ Thus, the product of the given numbers is $-45$.