Solve for x and y $\begin{pmatrix} 1 & 1 \\ 3 & y \end{pmatrix}$ $\begin{pmatrix} x \\ 1 \end{pmatrix}$ = $\begin{pmatrix} 4 \\ 1\end{pmatrix}$

x = 3, y = 8

x = 3, y = -8

x = -8, y = 3

x = 8, y = -3

Correct answer is B

$\begin{pmatrix} 1 & 1 \\ 3 & y \end{pmatrix}$ $\begin{pmatrix} x \\ 1 \end{pmatrix}$ = $\begin{pmatrix} 4 \\ 1\end{pmatrix}$ = x + 1 = 4

x = 4 - 1

= 3

3x + y =1

3(3) = y = 1

= 9 + y = 1

y = 1 - 9

= -8

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