Question

Which set of equations can be solved using the matrix equation:this is an online homework assignment I need help on for pre calculus

Answer 1

The given matrix equation is:

`\begin{pmatrix}4 & -1 \\ -2 & -1\end{pmatrix}\begin{pmatrix}x \\ y\end{pmatrix}=\begin{pmatrix}-5 \\ -3\end{pmatrix}`

To get the required equations, we will have to carry out the matrix multiplication, thus we have:

`\begin{gathered} (4* x)+(-1* y)=-5 \\ (-2* x)+(-1* y)=-3 \end{gathered}`
`\begin{gathered} 4x-y=-5 \\ -2x-y=-3 \end{gathered}`

Hence, the correct option is option D