Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
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Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises - Page 640: 84

Answer

-1

Work Step by Step

According to the last step of order of operations, we must evaluate addition and subtraction from left to right. First, we only consider $5-(-2)$. Change the minus sign to a plus sign and insert the opposite of the second number in place of the second number. $5-(-2)=5+(2)=5+2=7$ Next, we can subtract 8 from 7. $7-8=-1$
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