Let p and w represent the speed of the plane and the speed of the wind, respectively.
.. speed = distance/time
.. p +w = 720/3 = 240
.. p -w = 720/4 = 180
Add the two equations to eliminate w.
.. 2p = 420
.. p = 210
.. w = p -180 = 30
The speed of the wind is 30 mph.
The speed of the plane in still air is 210 mph.
Answer:x^2−y^2+4x−6y−5
Step-by-step explanation:
What is this supposed to be ?
Answer:
2x^3+3x^2+6x-4/x^2 +1
Step-by-step explanation:
