Answer
$33$
Work Step by Step
When $x=4$ and $y=-5$ then...
$12x+3y=(12\times4)+(3\times(-5))=48-15=33$
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 3 Linear Systems and Matrices - 3.3 Graph Systems of Linear Inequalities - 3.3 Exercises - Mixed Review - Page 173: 42
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