Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.5 - Addition of Real Numbers - Exercise Set - Page 63: 52



Work Step by Step

$... (-9)a+(-13)a=...$ Apply the distributive property, $...=[-9+(-13)]a==\quad$ ... same signs in brackets.\ Keep the sign, add the absolute values... $=-(9+13)a$ = $-22a$
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