We need to find x + z.
Where :
[tex]\begin{gathered} x=\begin{bmatrix}{3} & {8} \\ & \end{bmatrix} \\ \text{and } \\ z=\begin{bmatrix}{-5} & {-7} \\ {-3} & {10}\end{bmatrix} \end{gathered}[/tex]
Now, to add up to two matrices both need to have the same number of columns and rows.
In this case, x is a matrix 1x2 and z is a matriz 2x2.
Hence, the sum is not possible.
The correct answer is the first option "not possible"
