Magnitude (how much) and multitude (how many), the two principal types of quantities, are further divided as mathematical and physical.
Answer:
I believe it's the 3rd awnser
Answer:
No i do for other stuff but not this and the answer is 18
Step-by-step explanation:
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.
