Two airplanes leave dallas at the same time and fly in opposite directions. one airplane travels 80 miles per hour faster then the other. after 3 hours, they are 2490 miles apart. what is the speed of each airplane?

recall d = rt, distance = rate * time.

let's say airplane A is going at a rate of "r", therefore airplane B is moving faster, at a rate of "r + 80".

now, after 3 hours, both planes have been travelling for 3 hours each, and say if A has covered "d" miles, then B has covered the slack of 2490 - d.

i dont have an answer

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