I’m not quite sure what they mean by this so can someone provide the answer AND the step by step solution.

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)

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

Solve the equation by completing the square. x^2+2x=17