### Home > A2C > Chapter 7 > Lesson 7.3.4 > Problem7-200

7-200.

Let $A$ and $B$ be the matrices defined below. Complete each of the following matrix arithmetic problems.

1. $A − B$

$\begin{bmatrix} 9 & -1\\ 4 & 10 \end{bmatrix}$

1. $5A$

1. $AB$

$\begin{bmatrix} -23& \ 8\\ -29&-16 \end{bmatrix}$

1. $BA$

Refer to parts (a), (b),and (c).

$\left. \begin{array} { c } { A = \left[ \begin{array} { c c } { 4 } & { - 1 } \\ { 7 } & { 2 } \end{array} \right] } \\ { B = \left[ \begin{array} { c c } { - 5 } & { 0 } \\ { 3 } & { - 8 } \end{array} \right] } \end{array} \right.$