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 - 1.8 Exponential Notation and Order of Operations - 1.8 Exercise Set - Page 66: 8



Work Step by Step

Using $PEMDAS$ (Parenthesis, Exponent, Multiplication/Division, Addition/Subtraction) in the given expression, $ 7-9+15 ,$ addition or subtraction take the highest priority. Since subtraction appears first (from left to right) then the first operation to use is $\text{ subtraction .}$
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