#### 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 $r\leq1$.

Published by
McDougal Littell

ISBN 10:
0618595414

ISBN 13:
978-0-61859-541-9

$r\geq9$ or $r\leq1$.

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