0.5m = 0.75 solve for m pls and thx

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Through non-collinear points there is exactly one plane.