Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 5 & 1 \\ 2 & 5 \end{array} \right]$

Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 5 & 1 \\ 2 & 5 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r } 6 & 2 \\ 4 & - 2 \end{array} \right]$ . Find $\mathrm { A } + \mathrm { B }$ .

A)
$\left[\begin{array}{ll}1 & 3 \\6 & 3\end{array}\right]$
B)
$\left[\begin{array}{r}34 \\-13\end{array}\right]$
C)
$\left[\begin{array}{rr}1 & -3 \\-1 & -7\end{array}\right]$

D)
$[ 13 ]$