Please help me due today thanks :D

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Bring the fraction a/a-4 to a denominator of 16-a^2