Find $\begin{pmatrix} 2 \\ -5 \end{pmatrix} - 4 \begin{pmatrix} -1 \\ 7 \end{pmatrix}.$
To subtract two matrices, we need to subtract their corresponding entries. Let's start with the first entry. We have 2 minus 4 times -1. That gives us 2 minus -4 which is 6. The second entry is -5 minus 4 times 7. That gives us -5 minus 28, which is -33. So the result is $\begin{pmatrix} 6 \\ -33 \end{pmatrix}$. Right. $\begin{pmatrix} 6 \\ -33 \end{pmatrix}$ is the answer.

