The dilation d: (x, y) → (0.2x, 0.2y) has been applied to the polygon s(–5, 5), t(–5, 10), u(5, 15). what are the coordinates of the image points?

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.