Question

------------WILL FAN AND MEDAL-----------
At maximum speed, an airplane travels 1720 miles against the wind in 5 hours. Flying with the wind, the plane can travel the same distance in 4 hours.
Let x be the maximum speed of the plane and y be the speed of the wind. What is the speed of the plane with no wind?

Answer 1

@pinkbubbles

Answer 2

There are no answer choices this time :(

Answer 3

1720/x=5
5x=1720
x=1720/5
x=344 mph against the wind.
1720/y=4
4y=1720
y=1720/4
y=430 mph. with the wind.
(430-344)/2
86/2=43 mph. is the speed of the wind.
344+43=387
430-43=387 mph. speed of the plane in still air.

Answer 4

so the answer is 387?

Answer 5

Yup! :)