Question

Jack usually mows his lawn in 7hrs. Marilyn can mow the same yard in 5hrs. How much time would it take for them to mow the lawn together?

They could mow the lawn in ? hrs if they worked together

Answer 1

6hrs??? maybe

Answer 2

Is that a guess?

Answer 3

i need a good answer

Answer 4

2 hours 55 min

Answer 5

thx u sure

Answer 6

I used algebra, so I'm pretty sure that's right

Answer 7

na actually try this

jack is (1lot/7hrs) where marilyn is (1lot/5hrs) adding these together gives you .343 lots per hour so 1 lot/.343 lots per hours gives you 2.96 hours

Answer 8

ok how do i make that a integer or improper fraction or mixed number

Answer 9

it wouldn't make sense to take 6 hours if tweo people are working on the same area

Answer 10

oh nvm it was already answered... my bad :/

Answer 11

Yeah too bad your 2.96 isn't in terms of hours and minutes

Answer 12

obviously

Answer 13

You have to convert it

Answer 14

how the heck do i do that?

Answer 15

2+ .96(60)

Answer 16

Jack mows 1/7 lawns in an hour and Marilyn mows 1/5. Combined rate is 1/7+1/5 lawns per hour.

t is the time it takes to mow lawn together, so we have

(1/7+1/5)t=1

Giving t=35/12 hours=2 Hr, 55 min....Nicely done folks.

Answer 17

Yeah, I'm going with 2hrs 55 min

Answer 18

i have to many helping me here hero can help me

Answer 19

how to convert

Answer 20

Actually, the method I used only requires converting fractions into minutes, which is much easier in my opinion

Answer 21

Go Blue posted the steps College girl

Answer 22

so 2hr and 55min is converted already

Answer 23

Yes

Answer 24

Unless they want it all in terms of hours....Then it would be 2 and 11/12 hours

Answer 25

integer, improper fraction or mixed number

Answer 26

2 11/12 then

Answer 27

\[2 {{11} \over {12}}\]

Answer 28

Yes