UMMM i need help can u plz help?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

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?

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get