Answer
$63$
Work Step by Step
The integers have the same sign so their product is positive. Thus,
$-7 \cdot (-9)=63$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 1 - Solving Linear Equations - Maintaining Mathematical Proficiency - Page 1: 11
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