Solve for X in the equation given. $$5 A + 15 B = 5 X , A = \left[ \begin{array} { c c c }
- 9 & 7 & - 4 \
- 5 & - 2 & - 2
\end{array} \right] \text { and } B = \left[ \begin{array} { c c c }
- 2 & - 1 & - 4 \
- 5 & - 2 & 7
\end{array} \right]$$
A) $$\left[ \begin{array} { c c c }
- 15 & 4 & - 16 \
- 20 & - 8 & 19
\end{array} \right]$$
B) $$\left[ \begin{array} { c c c }
- 11 & 6 & - 8 \
- 10 & - 4 & 5
\end{array} \right]$$
C)not possible
D) $$\left[ \begin{array} { c c c }
- 75 & 20 & - 80 \
- 100 & - 40 & 95
\end{array} \right]$$
E) $$\left[ \begin{array} { c c c }
- 3 & 10 & 8 \
10 & 4 & - 23
\end{array} \right]$$

Question

Solve for X in the equation given. $$5 A + 15 B = 5 X , A = \left[ \begin{array} { c c c } 
- 9 & 7 & - 4 \
- 5 & - 2 & - 2
\end{array} \right] \text { and } B = \left[ \begin{array} { c c c } 
- 2 & - 1 & - 4 \
- 5 & - 2 & 7
\end{array} \right]$$
A) $$\left[ \begin{array} { c c c } 
- 15 & 4 & - 16 \
- 20 & - 8 & 19
\end{array} \right]$$
B) $$\left[ \begin{array} { c c c } 
- 11 & 6 & - 8 \
- 10 & - 4 & 5
\end{array} \right]$$
C)not possible
D) $$\left[ \begin{array} { c c c } 
- 75 & 20 & - 80 \
- 100 & - 40 & 95
\end{array} \right]$$
E) $$\left[ \begin{array} { c c c } 
- 3 & 10 & 8 \
10 & 4 & - 23
\end{array} \right]$$

Quizplus · Accepted Answer

First, calculate $5A + 15B$. Then, divide the result by 5 to solve for $X$. The correct matrix is option A.

Solve for X in the Equation Given A) [−154−16−20−819]\left[ \begin{array} { c c c } - 15 & 4 & - 16 \\- 20 & - 8 & 19\end{array} \right][−15−20​4−8​−1619​]

Solve for X in the Equation Given A) $\left[ \begin{array} { c c c } - 15 & 4 & - 16 \\- 20 & - 8 & 19\end{array} \right]$