Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Review Exercises: 38



Work Step by Step

Recall the acronym PEDMAS, which tells us the order of operations: P: Parenthesis and other grouping symbols E: Exponents D/M: Division and Multiplication (from left to right) A/S: Addition and Subtraction (from left to right) Use the rule above to obtain: (Recall, $a-(-b)=a+b$.) $=64-36 \div 9 \cdot 4 - (-7) \\=64 - 4 \cdot 4 -(-7) \\=64 - 16 -(-7) \\=48-(-7) \\=48+7 $ $\\=55$
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