Evaluate A-B given matrices A = [[5, 7], [9, 11]] and B = [[1, 2], [3, 4]]

Here are the solutions to the problems:

9. Evaluate A-B
Given matrices:

$$A = \begin{pmatrix} 5 & 7 \\ 9 & 11 \end{pmatrix}, \quad B = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix}$$

To find $A-B$, we subtract the corresponding elements of matrix B from matrix A:

$$A-B = \begin{pmatrix} 5-1 & 7-2 \\ 9-3 & 11-4 \end{pmatrix}$$ $$A-B = \begin{pmatrix} 4 & 5 \\ 6 & 7 \end{pmatrix}$$

The result is $\boxed{\begin