Matrix Addition, Subtraction, and Multiplication Practice Test

Matrices $P$ and $Q$ are given below:

$$P=\begin{bmatrix}1&2\-1&0\end{bmatrix},\quad Q=\begin{bmatrix}3&-2\4&1\end{bmatrix}.$$

Using matrices $P$ and $Q$, what is the product $PQ$?

Let $A$ and $B$ be $2\times 2$ matrices:

$$A=\begin{bmatrix}2&-1\0&3\end{bmatrix},\quad B=\begin{bmatrix}-4&5\1&-2\end{bmatrix}.$$

Given the matrices above, what is $A+B$?