Question

Given matrices A and B shown below, find (3)A+(8)B.

Answer 1

`\left[\begin{array}{ccc}32&-55\\3&39\end{array}\right]`

Explanation:

`\left[\begin{array}{ccc}0&-15\\3&15\end{array}\right] +\left[\begin{array}{ccc}32&-40\\0&24\end{array}\right] =\left[\begin{array}{ccc}0+32&-15+(-40)\\3+0&15+24\end{array}\right] = \left[\begin{array}{ccc}32&-55\\3&39\end{array}\right]`