Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 2 - Graphs and Functions - 2.3 Functions - 2.3 Exercises: 64

Answer

$f(a+4)=-3a-8$

Work Step by Step

To find the value of $f(a+4)$, substitute $a+4$ to $x$ in $f(x)$ to obtain: $f(x)=-3x+4 \\f(a+4)=-3(a+4)+4 \\f(a+4) = -3(a) +(-3)(4)+4 \\f(a+4)=-3a+(-12)+4 \\f(a+4)=-3a+(-8) \\f(a+4)=-3a-8$
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