PLEASE HELP! WILL MARK BRAINLIEST (GEOGRAPHY)

An angle that measures between 90 and 180° is called a(,

!! 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?

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)