Answer
$[-140,-28]$
Work Step by Step
Given $|C+84|\le56$, we have $-56\le C+84\le 56$ which gives $-140^\circ C\le C\le -28 ^\circ C$ or $C\in [-140,-28]$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 1 - Equations and Inequalities - 1.8 Absolute Value Equations and Inequalities - 1.8 Exercises - Page 168: 78
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