Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

plane 1 travels 395 miles in 1 hour

plane 2 travels 422 miles in 1 hour

together, they travel (395+422) 817 miles in 1 hour

to have 2451 miles between then, they'd need to travel

so in 3 hours, they'll be 2451 miles apart

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13