91Ó°ÊÓ

Find the product, if possible.

$\left[\begin{array}{cc}5& 2\end{array}\right]·\left[\begin{array}{c}-2\\ 3\end{array}\right]$

Graph each set of ordered pairs on a coordinate plane.

$\{(−1,2),(2,4),(3,−3),(4,−1)\}$

Name the property illustrated by each equation.

59. $\frac{7}{9}.\frac{9}{7}=1$

Use cross products to solve each proportion.

$\frac{x}{8}=\frac{3}{4}$

Find the inverse of each matrix, if it exists.

6.

Solve each equation.

$\left[\begin{array}{c}\mathbf{x}\mathbf{+}\mathbf{4}\\ \mathbf{2}\mathit{y}\end{array}\right]\mathbf{=}\left[\begin{array}{c}\mathbf{9}\\ \mathbf{12}\end{array}\right]$

Perform the indicated matrix operation. If the matrix doesn’t exist, write impossible.

6.$3\left[\begin{array}{cccc}6& −1& 5& 2\\ 7& 3& −2& 8\end{array}\right]$

Perform the indicated matrix operations.

$\left[\begin{array}{cc}3& 0\\ 7& 12\end{array}\right]−\left[\begin{array}{cc}6& −5\\ 4& −1\end{array}\right]$

Find each product, if possible.

$\left[\begin{array}{cc}3& −5\end{array}\right]â‹\dots \left[\begin{array}{cc}3& 5\\ −2& 0\end{array}\right]$

Triangle $ABC$ with vertices $A\left(1,4\right),B\left(2,-5\right),\text{and}C\left(-6,-6\right)$ is translated 3 units right and 1 unit down.

6. Graph the preimage and the image.