Answer
\begin{bmatrix}
8\\
\end{bmatrix}
Work Step by Step
$$
\begin{bmatrix}3 & 1
\end{bmatrix}
\times
\begin{bmatrix}
5\\
7
\end{bmatrix}
=
\begin{bmatrix}
3(5) & (-1)(7)
\end{bmatrix}
=
\begin{bmatrix}
8
\end{bmatrix}
\quad
$$
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 199: 10
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