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 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set: 83

Answer

$-2$

Work Step by Step

The order of operations follow the following degree of priority (PEMDAS rule): First Priority: Parentheses and grouping symbols Second Priority: Exponents Third Priority: Multiplication or Division, whichever comes first from the left Fourth Priority: Addition or Subtraction, whichever comes first from the left Use the rule above to find: $=-20-(-18) \\=-20+18 \\=-2$
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