I need an answer ASAP

!! 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 a line is defined by the equation y = 5x + 2, what is the slope?

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale