Ajet travels from miami to london round trip. it takes 8 hours to get there and 7 hours to return home. the jets average air speed is 500 mph. what is the average speed of the wind

From the basic equation: distance = rate * time
From Miami to London (against the wind): distance = (500 - wind speed) * 8
From London to Miami (with the wind): distance = (500 + wind speed) * 7
Equating both gives:
(500 - wind speed) * 8 = (500 + wind speed) * 7
wind speed = 33.33 mph
The average speed of the wind is 33.33 mph.

I'm a bit puzzled here because they did not provide you with any measures of the other angles, so i am unable to provide a theorem or postulate to support my answer, but i'd say 90 degrees because it looks closer to a right angle than anything.