Answer
63
Work Step by Step
-9(-7)
Multiplication
The factors have the same sign(both are negative). The product is positive.
-9 * -7 = 63
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 9 - Basic Algebra - Summary Exercises - Operations with Signed Numbers - Page 658: 5
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