Help pls this is the third time I asked for help pls someone!!!

Which graph corresponds to the function f(x) = x2 + 4x – 1?

!! 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?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).