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 43: 91


The explanation is below.

Work Step by Step

Consider this problem by thinking of addition on the number line. When you add a negative, you go left, but if you add a positive, you go right. Since it is impossible to go left twice (by adding two negative numbers) and end up further right than you started, the sum of two negative numbers cannot be positive.
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