Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 1 - Introduction to Algebraic Expressions - 1.5 Addition of Real Numbers - 1.5 Exercise Set - Page 42: 23

Answer

-5

Work Step by Step

When adding numbers of different signs, we subtract the absolute values (15 - 10 = 5), and take the sign of the number with the larger absolute value, which is negative here (-5).
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