Answer
$$4x+27$$
Work Step by Step
Plugging in $f(x)=2x+9$, we find:
$$2\left(2x+9\right)+9 \\ 4x+27$$
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 6 Rational Exponents and Radical Functions - Chapter Test - Page 469: 23
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