Perform the indicated operation.
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 3 & 1 \ 0 & 2 \end{array} \right]$. Find $3 \mathrm {~A}$.
A) $\left[ \begin{array} { r r } - 9 & 3 \ 0 & 2 \end{array} \right]$

B) $\left[ \begin{array} { l l } 0 & 4 \ 3 & 5 \end{array} \right]$

C) $\left[ \begin{array} { r r } - 9 & 3 \ 0 & 6 \end{array} \right]$

D) $\left[ \begin{array} { r r } - 9 & 1 \ 0 & 2 \end{array} \right]$

Question

Perform the indicated operation.
-Let $\mathrm { A } = \left[ \begin{array} { r r } - 3 & 1 \ 0 & 2 \end{array} \right]$. Find $3 \mathrm {~A}$.
A) $\left[ \begin{array} { r r } - 9 & 3 \ 0 & 2 \end{array} \right]$

B) $\left[ \begin{array} { l l } 0 & 4 \ 3 & 5 \end{array} \right]$

C) $\left[ \begin{array} { r r } - 9 & 3 \ 0 & 6 \end{array} \right]$

D) $\left[ \begin{array} { r r } - 9 & 1 \ 0 & 2 \end{array} \right]$

Quizplus · Accepted Answer

To find $3 \mathrm {~A}$, multiply each element of matrix $\mathrm { A }$ by 3, resulting in $\left[ \begin{array} { r r } - 9 & 3 \ 0 & 6 \end{array} \right]$.

Perform the Indicated Operation A=[−3102]\mathrm { A } = \left[ \begin{array} { r r } - 3 & 1 \\ 0 & 2 \end{array} \right]A=[−30​12​]

Perform the Indicated Operation $\mathrm { A } = \left[ \begin{array} { r r } - 3 & 1 \\ 0 & 2 \end{array} \right]$