What is the equation

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Darian wants to build a regulation size pool table that is 9 feet in length.he plans he ordered are 18 by 36 inches. what is the scale factor of the dilation he must use to build a regulation pool table