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 1.1 - Algebraic Expressions, Real Numbers, and Interval Notation - Exercise Set: 22

Answer

$12$

Work Step by Step

Substitute $8$ in for $x$ to obtain: $=8^2-7\cdot 8 +4$ Apply the exponent first to obtain: $=64-7\cdot 8+4$ Perform multiplication next: $=64-56 + 4$ Perform subtract first and then addition: $=8 + 4 \\=12$
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