College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 6 - Matrices and Determinants - Exercise Set 6.4 - Page 639: 30

Answer

$\left[\begin{array}{ll} 7 & 5\\ 3 & 2 \end{array}\right]\left[\begin{array}{l} x\\ y \end{array}\right] $=$ \left[\begin{array}{l} 23\\ 10 \end{array}\right]$

Work Step by Step

Coefficient matrix A=$\left[\begin{array}{ll} 7 & 5\\ 3 & 2 \end{array}\right]$ Constant matrix B=$\left[\begin{array}{l} 23\\ 10 \end{array}\right]$ Matrix equation: $AX=B$ $\left[\begin{array}{ll} 7 & 5\\ 3 & 2 \end{array}\right]\left[\begin{array}{l} x\\ y \end{array}\right] $=$ \left[\begin{array}{l} 23\\ 10 \end{array}\right]$
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