Karen purchase a DVD player that cost $153.77 the DVD player used to be $175.90 what was the percent markdown (show work)

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?