What is f(a+2)? Help

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

One integer is 5 more than another. their product is 104. find the integers

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?