Evaluate the expression.
$$\left[ \begin{array} { c c }
- 7 & - 3 \
6 & 5
\end{array} \right] + \left[ \begin{array} { c c }
- 6 & 7 \
- 1 & 2
\end{array} \right] + \left[ \begin{array} { c c }
4 & 9 \
9 & 4
\end{array} \right]$$
A) $\left[ \begin{array} { c c } - 17 & - 5 \ - 4 & 3 \end{array} \right]$
B) $\left[ \begin{array} { l l } - 9 & 13 \ 14 & 11 \end{array} \right]$
C) $\left[ \begin{array} { c c } - 13 & 4 \ 5 & 7 \end{array} \right]$
D) $\left[ \begin{array} { l l } 1 & 0 \ 0 & 1 \end{array} \right]$
E) not possible

Question

Evaluate the expression.
$$\left[ \begin{array} { c c } 
- 7 & - 3 \
6 & 5
\end{array} \right] + \left[ \begin{array} { c c } 
- 6 & 7 \
- 1 & 2
\end{array} \right] + \left[ \begin{array} { c c } 
4 & 9 \
9 & 4
\end{array} \right]$$
A) $\left[ \begin{array} { c c } - 17 & - 5 \ - 4 & 3 \end{array} \right]$
B) $\left[ \begin{array} { l l } - 9 & 13 \ 14 & 11 \end{array} \right]$
C) $\left[ \begin{array} { c c } - 13 & 4 \ 5 & 7 \end{array} \right]$
D) $\left[ \begin{array} { l l } 1 & 0 \ 0 & 1 \end{array} \right]$
E) not possible

Quizplus · Accepted Answer

To find the sum of the matrices, add the corresponding elements:$$\begin{align*}&\left[ \begin{array} { c c } - 7 & - 3 \6 & 5\end{array} \right] + \left[ \begin{array} { c c } - 6 & 7 \- 1 & 2\end{array} \right] + \left[ \begin{array} { c c } 4 & 9 \9 & 4\end{array} \right] \= &\left[ \begin{array} { c c } - 7 - 6 + 4 & - 3 + 7 + 9 \6 - 1 + 9 & 5 + 2 + 4\end{array} \right] \= &\left[ \begin{array} { c c } - 9 & 13 \14 & 11\end{array} \right]\end{align*}$$

Evaluate the Expression A) [−17−5−43]\left[ \begin{array} { c c } - 17 & - 5 \\ - 4 & 3 \end{array} \right][−17−4​−53​]

Evaluate the Expression A) $\left[ \begin{array} { c c } - 17 & - 5 \\ - 4 & 3 \end{array} \right]$