Find $7 A$.
$$A = \left[ \begin{array} { l l }
8 & 8 \
3 & 2
\end{array} \right]$$
A) $\left[ \begin{array} { c c } 56 & 8 \ 3 & 2 \end{array} \right]$

B)
$\left[ \begin{array} { c c } 56 & 8 \ 21 & 14 \end{array} \right]$

C) $\left[ \begin{array} { c c } 8 & 56 \ 21 & 14 \end{array} \right]$

D) $\left[ \begin{array} { c c } 8 & 56 \ 3 & 14 \end{array} \right]$

E) $\left[ \begin{array} { l l } 56 & 56 \ 21 & 14 \end{array} \right]$

Question

Find $7 A$.
$$A = \left[ \begin{array} { l l } 
8 & 8 \
3 & 2
\end{array} \right]$$
A) $\left[ \begin{array} { c c } 56 & 8 \ 3 & 2 \end{array} \right]$

B)
$\left[ \begin{array} { c c } 56 & 8 \ 21 & 14 \end{array} \right]$

C) $\left[ \begin{array} { c c } 8 & 56 \ 21 & 14 \end{array} \right]$

D) $\left[ \begin{array} { c c } 8 & 56 \ 3 & 14 \end{array} \right]$

E) $\left[ \begin{array} { l l } 56 & 56 \ 21 & 14 \end{array} \right]$

Quizplus · Accepted Answer

Multiplying matrix $A$ by 7 means multiplying each element of $A$ by 7, resulting in $\left[ \begin{array} { l l } 56 & 56 \ 21 & 14 \end{array} \right]$.

Find 7A7 A7A A=[8832]A = \left[ \begin{array} { l l } 8 & 8 \\3 & 2\end{array} \right]A=[83​82​]

Find $7 A$ $A = \left[ \begin{array} { l l } 8 & 8 \\3 & 2\end{array} \right]$