Two planes are 20000 miles apart. if one plane is traveling at 1000 miles per hour and the other is traveling at 4000 miles per hour. when will their paths cross

!! 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 describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c