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mote1985 [20]
1 year ago
10

What is the best way to design a study to determine how much traffic there is during the morning rush

Mathematics
1 answer:
Dominik [7]1 year ago
5 0

Answer:

Step-by-step explanation:

AAAAA+++++++++

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Flying against the wind, an airplane travels 4200 km in 7 hours. Flying with the wind, the same plane travels 4000 km in 4 hours. What is the rate of the plane in still air and what is the rate of the wind?

Answer · 1 vote

Let Va = the velocity of the airplane Let Vw = the velocity of the wind When flying with the wind: (Va+Vw)*(4 hours) = 4000 4Va + 4Vw = 4000 4Vw = 4000 - 4Va Vw = 1000 - Va When flying against the wind: (Va-Vw)*(7 hours) = 4200 km7Va - 7Vw = 4200 Substitute 1000-Va for Vw and solve for Va: 7Va - 7(1000-Va) = 4200 7Va -7000 + 7Va = 4200 14Va = 11200 Va = 800 km/hr Rate of wind: Vw = 1000 - Va = 1000 - 800 = 200 km/hour

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Flying against the wind, an airplane travels 4500 in 5 hours. Flying with the wind, the same plane travels 4640 in 4 hours. What is the rate of the plane in still air and what is the rate of the wind?

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The speed of plane in still air is 1030 km/hr and wind

Step-by-step explanation:

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2 years ago
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3 years ago
Luci cuts a board that is 3/7 yard long into pieces that are 3/14 yard long. How many pieces does she cut?
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