Answer
$(-∞,∞)$
Work Step by Step
Since no number can make this function undefined, the domain includes all real numbers.
$f(x)=3(x-4)$
$f(x)=3x-12$
$(-∞,∞)$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 2 - Functions and Graphs - Exercise Set 2.6 - Page 297: 1
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