Which algebraic expression represents “twice the sum of y and 9”

If f(x) = -5x + 1 and g(x) = x3, what is (gºf)(0)? enter the correct answer

Ribbon a is 1/3 meters long. it is 2/5 meters shorter than ribbon b. what's the total length of 2 ribbons?

Of the 189 miles of beaches at ocean side, 7% are privately owned 39% are owned by resorts, and 54% are public beaches. how many miles of beach are not public?