Answer
$r\geq9$ or $r\leq1$.
Work Step by Step
$|5-r|\geq4$ implies $5-r\geq4\\-r\geq-1\\r\leq1$ or $5-r\leq-4\\9\leq r$.
Thus $r\geq9$ or $r\leq1$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 1, Equations and Inequalities - 1.7 Solve Absolute Value Equations and Inequalities - 1.7 Exercises - Quiz for Lessons 1.6-1.7 - Page 58: 12
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