Question 820622
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s = d / t
d = s * t
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up:
D = (x - y) * 2.5
2.5x - 2.5y = 210
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down:
D = (x + y) * 1.5
1.5x + 1.5y = 210
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system of equations:
2.5x - 2.5y = 210
1.5x + 1.5y = 210
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x= 112
y= 28
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answer:
airplaine speed in still air = 112 mph
wind speed = 28 mph
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