I really need help with this​

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?