Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 1 & 0 \\ 3 & 1 \end{array} \right]$

Multiple Choice

Add and Subtract Matrices
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 1 & 0 \\ 3 & 1 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r } - 1 & 3 \\ 3 & 1 \end{array} \right]$ . Find $\mathrm { A } - \mathrm { B }$ .

A)
$\left[ \begin{array} { r r } 0 & - 3 \\ 0 & 0 \end{array} \right]$
B)
$\left[ \begin{array} { r } - 23 \\ 62 \end{array} \right]$
C)
$\left[ \begin{array} { l l } 0 & 3 \\ 0 & 0 \end{array} \right]$
D)
$[ - 3 ]$