Answer
See below
Work Step by Step
Given $f(x)=5\sqrt x\\g(x)=-4\sqrt x$
Hence, $(f-g)(x)\\=5\sqrt x-(-\sqrt x)\\=9\sqrt x$
The domain is all positive numbers, $[0,+\infty)$.
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 13, Trigonmetric Ratios and Functions - 13.6 Apply the Law of Cosines - 13.6 Exercises - Mixed Review - Page 894: 60
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