Given f(x) = 2x + 9, if f(x) = 15, find x.

What is [tex] {7}^{98 + \sqrt{4} } - 3 \times (64 \div 2 + 4 - 36) \times a = a + 36[/tex]?

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.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?