Question

Can someone help pls !

Answer 1

(B).
`A_(y)` =
`\left[\begin{array}{cc}12&7\\17&-51\end{array}\right]`

Explanation:

12x - 13y = 7

17x - 22y = - 51

A =
`\left[\begin{array}{cc}12&-13\\17&-22\end{array}\right]`

`A_(x)` =
`\left[\begin{array}{cc}7&-13\\-51&-22\end{array}\right]`

`A_(y)` =
`\left[\begin{array}{cc}12&7\\17&-51\end{array}\right]`