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: 21

Answer

$-5$

Work Step by Step

The addends (numbers being added have) different signs. To add two numbers with different signs, perform the following steps: (1) Subtract their absolute values. $|-9|-|4|=9-4=5$ (2) Use the sign of the number with the bigger absolute value. $-9+4=-5$ Thus, the sum is $-5$.
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