Solve and explain please and thank you

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?