Write the simplified expression for the rectangle's perimeter

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?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.