Answer
$(-∞,7]\cup[11,∞)$
Work Step by Step
$|x-9|\geq2$
$x-9\leq-2$ or $x-9\geq2$
$x\leq7$ or $x\geq11$
$(-∞,7]\cup[11,∞)$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Appendix D - Exercise Set - Page 996: 62
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