Answer
$(f+g)(x)=x^{2}+3x+2$
$(f+g)(4)=30$
Work Step by Step
$(f+g)(x)=f(x)+g(x)$
$=x^{2}+4x+2-x$
$=x^{2}+3x+2$
Plugin $x=4$ into $x^{2}+3x+2$.
$(f+g)(4)=4^{2}+3\times4+2=16+12+2=30$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 2 - Section 2.3 - The Algebra of Functions - Exercise Set - Page 133: 32
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