Find the indicated matrix.
-Let $\mathrm { A } = \left[ \begin{array} { l l } 2 & 3 \ 2 & 4 \end{array} \right]$ and $\mathrm { B } = \left[ \begin{array} { r r } 0 & 4 \ - 1 & 6 \end{array} \right]$. Find $4 \mathrm {~A} + \mathrm { B }$.
A) $\left[ \begin{array} { l l } 8 & 16 \ 1 & 10 \end{array} \right]$
B) $\left[ \begin{array} { c c } 8 & 7 \ 7 & 10 \end{array} \right]$
C) $\left[ \begin{array} { l l } 8 & 16 \ 7 & 22 \end{array} \right]$
D) $\left[ \begin{array} { l l } 8 & 28 \ 4 & 40 \end{array} \right]$

Question

Quizplus · Accepted Answer

To find $4 \mathrm {~A} + \mathrm { B }$, first multiply each element of matrix A by 4, resulting in $\left[ \begin{array} { l l } 8 & 12 \ 8 & 16 \end{array} \right]$, and then add this to matrix B element-wise, resulting in $\left[ \begin{array} { l l } 8 & 16 \ 7 & 22 \end{array} \right]$.

Find the Indicated Matrix A=[2324]\mathrm { A } = \left[ \begin{array} { l l } 2 & 3 \\ 2 & 4 \end{array} \right]A=[22​34​]

Find the Indicated Matrix $\mathrm { A } = \left[ \begin{array} { l l } 2 & 3 \\ 2 & 4 \end{array} \right]$