Answer
$73$
Work Step by Step
$det\begin{bmatrix}
5 & 7 \\
-4 & 9
\end{bmatrix}
=(5\times9)-(-4\times7)=45+28=73
$
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 5 Polynomials and Polynomial Functions - 5.3 Add, Subtract, and Multiply Polynomials - 5.3 Exercises - Mixed Review - Page 352: 77
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