Answer
$-3a-3b+4$
Work Step by Step
We are given that $f(x)=-3x+4$. In order to evaluate the function at $a+b$, we can plug in $a+b$ to the function and evaluate directly.
$f(a+b)=-3(a+b)+4=(-3)(a)+(-3)(b)+4=-3a-3b+4$
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 2 - Section 2.6 - Function Notation and Linear Functions - 2.6 Exercises - Page 202: 30
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