Answer
$x=3$ and $y=35$
Work Step by Step
$(-2\times9)+(2\times x)+(1\times(-1))=-13$
$-18+2x-1=-13$
$2x=18-13+1$
$2x=6$
$x=3$
$36+2-3=y$
$y=35$
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 - 3.6 Multiplying Matrices - 3.6 Exercises - Skill Practice - Page 200: 31
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