Which relation defined by a set of order pairs is not a function

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.

Opposite angles in a parrellelogram are

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.