Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x))=x. f(x)=(x-8)/(x+7) and g(x)=(-7x-8)/(x-1)

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )