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Tatiana [17]
3 years ago
6

A plane can travel 640 miles against the wind in the same town we can drive 100 miles with the wind. If the plane complot 180 mp

h at income air, what is the speed of the wind?
10 mph
15 mph
20 mph
Mathematics
1 answer:
sdas [7]3 years ago
5 0
D=rtw=speed of the wind640=(180-w)t800=(180+w)t640=180t-wt800=180t+wtadd1440=360tt=1440/360t=4 hourssubstitute into either equation640=(180-w)*4divide both sides by 4160=180-w160-180=-w-20=-ww=20 miles per hour which is C.
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