The right one need help giving brainiest its the quiz

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)

What is sin 7x/4 ? i need on this urgent trig

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab