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.

Question

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.

tennistar · Answer

d = 3(r − 30) and d = 2(r + 30)
or Number 1

tennistar · Answer

A

anonymous · Answer

Your such a big help :) If you dont mind to continue helping me out :)

tennistar · Answer

Ok I will try, BTW are taking FLVS Algebra 1