Find x and y. $$\left[ \begin{array} { c c }
x & - 2 \
7 & y
\end{array} \right] = \left[ \begin{array} { c c }
- 20 & - 2 \
7 & 3
\end{array} \right]$$
A) $x = 20 , y = - 3$
B) $x = \frac { 1 } { 20 } , y = - \frac { 1 } { 3 }$
C) $x = \frac { 1 } { 20 } , y = \frac { 1 } { 3 }$
D) $x = - 20 , y = 3$
E) $x = - \frac { 1 } { 20 } , y = \frac { 1 } { 3 }$

Question

Find x and y.​ $$\left[ \begin{array} { c c } 
x & - 2 \
7 & y
\end{array} \right] = \left[ \begin{array} { c c } 
- 20 & - 2 \
7 & 3
\end{array} \right]$$ ​
A) $x = 20 , y = - 3$
B) $x = \frac { 1 } { 20 } , y = - \frac { 1 } { 3 }$
C) $x = \frac { 1 } { 20 } , y = \frac { 1 } { 3 }$
D) $x = - 20 , y = 3$
E) $x = - \frac { 1 } { 20 } , y = \frac { 1 } { 3 }$

Quizplus · Accepted Answer

The Answer is D

Find X and Y [x−27y]=[−20−273]\left[ \begin{array} { c c } x & - 2 \\7 & y\end{array} \right] = \left[ \begin{array} { c c } - 20 & - 2 \\7 & 3\end{array} \right][x7​−2y​]=[−207​−23​]

Find X and Y $\left[ \begin{array} { c c } x & - 2 \\7 & y\end{array} \right] = \left[ \begin{array} { c c } - 20 & - 2 \\7 & 3\end{array} \right]$