Solve the problem.
-Let $A = \left[ \begin{array} { r r } - 7 & 1 \ 2 & 5 \end{array} \right]$ and $B = \left[ \begin{array} { r r } 6 & 2 \ 3 & - 3 \end{array} \right]$. Find $A + B$.
A)
$\left[ \begin{array} { r r } - 1 & 3 \ 5 & 2 \end{array} \right]$
B)
$\left[ \begin{array} { r l } 3 & 4 \ - 2 & 2 \end{array} \right]$
C)
$\left[ \begin{array} { r r } - 1 & - 5 \ - 4 & - 10 \end{array} \right]$

D)
$[ 9 ]$

Question

Solve the problem.
-Let $A = \left[ \begin{array} { r r } - 7 & 1 \ 2 & 5 \end{array} \right]$ and $B = \left[ \begin{array} { r r } 6 & 2 \ 3 & - 3 \end{array} \right]$. Find $A + B$.
A)
$\left[ \begin{array} { r r } - 1 & 3 \ 5 & 2 \end{array} \right]$
B)
$\left[ \begin{array} { r l } 3 & 4 \ - 2 & 2 \end{array} \right]$
C)
$\left[ \begin{array} { r r } - 1 & - 5 \ - 4 & - 10 \end{array} \right]$

D)
$[ 9 ]$

Quizplus · Accepted Answer

To add two matrices, we simply add the corresponding entries. Adding the given matrices $A$ and $B$, we get $$A + B = \left[ \begin{array} { r r } - 7 & 1 \ 2 & 5 \end{array} ight] + \left[ \begin{array} { r r } 6 & 2 \ 3 & - 3 \end{array} ight] = \left[ \begin{array} { r r } -1 & 3 \ 5 & 2 \end{array} ight]$$ Therefore, the answer is choice $	extbf{(A)}$.

Solve the Problem A=[−7125]A = \left[ \begin{array} { r r } - 7 & 1 \\ 2 & 5 \end{array} \right]A=[−72​15​]

Solve the Problem $A = \left[ \begin{array} { r r } - 7 & 1 \\ 2 & 5 \end{array} \right]$