Question

Don’t show work. It’s not necessary. I just need answers to check my doings. Directions in pic

Answer 1

$\begin{gathered} A=\begin{bmatrix}{1} & {-3} & {} \\ {4} & {-1} & {} \\ {} & & {}\end{bmatrix} \\ E=\begin{bmatrix}{7} & {-7} & {} \\ 11 & {-9} & {} \\ {} & & {}\end{bmatrix} \\ A+E=\begin{bmatrix}{1}+7 & {-3+(-7)} & {} \\ {4+11} & {-1+(-9)} & {} \\ {} & & {}\end{bmatrix} \\ A+E=\begin{bmatrix}8 & {-10} & {} \\ {15} & {-10} & {} \\ {} & & {}\end{bmatrix} \end{gathered}$