Write an expression for the verbal phrase: Seven less than m

Which function has the same domain as y=2x

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

The estimated number of people to attend the last bengals game of the season was 2000. the actual number of fans attending was 1200. by what percent did the estimate differ from the actual?