Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 9 - Basic Algebra - 9.1 Signed Numbers - 9.1 Exercises - Page 629: 36



Work Step by Step

The absolute value of a number is the distance between that number and 0 on the number line. Therefore, absolute value will always be positive, because distance can only be a positive measurement. $|20|=20$, because 20 is 20 spaces from 0 on the number line Therefore, $-|20|=-1(20)=-1\times20=-20$.
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