Add and subtract matrices
The matrix \(D\) below records the points scored by each team in the first round of a trivia night. The matrix \(N\) records the points scored in the second round
In both matrices, the rows are Team 1, Team 2 (top to bottom) and the columns are Science, History (left to right)
\[D = \begin{bmatrix} 8 & 1 \\ 3 & 10 \end{bmatrix}\]
\[N = \begin{bmatrix} 3 & 3 \\ 8 & 4 \end{bmatrix}\]