Question

Which set of equations would be used to solve this word problem?

An airplane flew 4.5 hours with a 45 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air.

None of these systems can be used to solve this problem.

d = 7(r + 45)

d = 4.5(r + 45) and d = 2.5(r − 45)

d = 4.5(r − 45) and d = 2.5(r + 45)

Answer 1

distance = speed * time
if speed instill air is r
what speed does he go when theres a head wind against him?

Answer 2

- if speed of wind is 45?

Answer 3

ok

Answer 4

r - 45 right?

Answer 5

yes

Answer 6

so u got it

Answer 7

i think

Answer 8

third or last option?

Answer 9

i think the third one

Answer 10

he takes longer with a head wind right?

Answer 11

4.5 hours with headwind
2.5 with wind behind him

Answer 12

oh

Answer 13

so it's the last one

Answer 14

right d is same - r-45 is slowest speed - so time is greater
d = 4.5(r - 45)

Answer 15

oh ok thank you

Answer 16

yw