What's the middle number between 20 and 30?​

!! 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?

Which statements regarding efg are true? check all that apply.

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu