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Which set of equations would be used to solve this word problem?
An airplane flew 3 hours with a 30 mph head wind. The return trip with a tail wind of the same speed took 2 hours. Find the speed of the plane in still air.
d = 3(r − 30) and d = 2(r + 30)
d = 3(r + 30) and d = 2(r − 30)
d = 5(r + 30)
None of these systems can be used to solve this problem.
 one year ago
 one year ago
Which set of equations would be used to solve this word problem? An airplane flew 3 hours with a 30 mph head wind. The return trip with a tail wind of the same speed took 2 hours. Find the speed of the plane in still air. d = 3(r − 30) and d = 2(r + 30) d = 3(r + 30) and d = 2(r − 30) d = 5(r + 30) None of these systems can be used to solve this problem.
 one year ago
 one year ago

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RajshikharGuptaBest ResponseYou've already chosen the best response.1
i think it should be 2nd one
 one year ago
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