Perform the indicated operation.
-Let $A=\left[\begin{array}{ll}3 & 3 \ 2 & 4\end{array}\right]$ and $B=\left[\begin{array}{rr}0 & 4 \ -1 & 6\end{array}\right]$. Find $4 A+B$.
A)$\left[\begin{array}{rr}12 & 7 \ 7 & 10\end{array}\right]$
B)$\left[\begin{array}{rr}12 & 28 \ 4 & 40\end{array}\right]$
C)$\left[\begin{array}{rr}12 & 16 \ 1 & 10\end{array}\right]$
D) $\left[\begin{array}{rr}12 & 16 \ 7 & 22\end{array}\right]$

Question

Quizplus · Accepted Answer

First, multiply matrix A by 4: $4A = \left[\begin{array}{ll}12 & 12 \ 8 & 16\end{array}\right]$. Then, add matrix B: $4A + B = \left[\begin{array}{ll}12 & 12 \ 8 & 16\end{array}\right] + \left[\begin{array}{rr}0 & 4 \ -1 & 6\end{array}\right] = \left[\begin{array}{rr}12 & 16 \ 7 & 22\end{array}\right]$.

Perform the Indicated Operation A=[3324]A=\left[\begin{array}{ll}3 & 3 \\ 2 & 4\end{array}\right]A=[32​34​]

Perform the Indicated Operation $A=\left[\begin{array}{ll}3 & 3 \\ 2 & 4\end{array}\right]$