A back yard pool is 20 feet wide and 60 feet long. What size cover would be needed to completely cover the top of the pool?

What is the value of x? 3x + (6x - 6) = 4(2x-2)

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.

Javier bought a painting for $150. each year, the painting's value increases by a factor of 1.15. which expression gives the painting's value after 77 years?