Plz, help me with this question!

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

What is the first step of an indirect proof of a number that is divisible by two

In 1995 america online had about 3000000 users over the next decade users are expected to increase from a few million to the tens of millions suppose the number of users increased by 150% by the year 2000 how many users will there be in the year 2000