Can someone plz me with number 6 i’m not under stand this show work plzz

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

Simplify the expression. -2/5(10+15m-20n)

How to find the exponential function y=ca^x, with points (1,2) and (2,1)