whoever answers this gets a medal!!An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air.

240 mph

220 mph

200 mph

180 mph

Question

whoever answers this gets a medal!!An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air. 

 240 mph 

 220 mph 

 200 mph 

 180 mph

anonymous · Answer

Headwind distance = 3.5(x-40)
 Tailwind distance = 2.5(x+40)
 3.5(x-40) = 2.5(x+40)
 3.5x-140=2.5x+100
 x=140+100
 x=240 mph speed of plane in still air

The answer is A)240

anonymous · Answer

thank you!

anonymous · Answer

your welcome jader. anything else u need help with?

anonymous · Answer

Part 1:
Solve the following system of equations. Please show your work to receive full credit.
x - y = 19
2x + y = 2

Part 2:
Explain which method you chose to solve the system and why you felt it was the best choice.

anonymous · Answer

please :)