Question

Can someone help me set up the equation thats where i need help.

Mutt and Jeff need to paint a fence. Mutt can do the job alone 5 hours faster than Jeff. If together they work for 24 hours and finish only 7/8 of the job, how long would Jeff need to do the job? alone?

Answer 1

your numbers don't work out evenly, so it makes me think you are typing the problem wrong. we write it or edit your original and i will solve it for you.

Answer 2

i copied and paste the problem

Answer 3

@mathandphysic i tried this repeatedly and got a very strange answer.
what did you get

Answer 4

i didn't do it, the numbers are stupid. i will do it give me a second

Answer 5

i got an equation of
\[24\times (\frac{1}{x}+\frac{1}{x-5})=\frac{7}{8}\] but maybe that is wrong

Answer 6

Sat u r right.

Answer 7

i just dont wanna solve, it's toooooo long.

Answer 8

It's a 27 and 3/7 hour job for the 2 of them together, right?

Answer 9

i don''t know maybe the equation is wrong. lets say jeff can complete the job in 60 hours then jeff can complete it in 55 hours right? so jeff completes 1/60 of the job in an hour and mutt completes 1/55 of the job. combined their rate is
\[\frac{1}{60}+\frac{1}{55}\] and if you multiply the rate by 24 you should get 7/8

Answer 10

just as an example. that is why i thought you should solve
\[24(\frac{1}{x}+\frac{1}{x-5})=\frac{7}{8}\] for x

Answer 11

but when i do that the numbers are so ugly that it must be wrong. so maybe i made a mistake

Answer 12

unless it is supposed to be mutt can complete the job 5 times faster
but if you copied and pasted then that is not right

Answer 13

i copied and pasted it i went back and look its right

Answer 14

i cant get it

Answer 15

what about it can't you get

Answer 16

the answer as far as i got with that equation is 7x^2-414x+960=0
does it factor because i dont think it does

Answer 17

you factored it incorrectly.. hold

Answer 18

24/x + 24/(x-5) = 7/8
common denominator
(48x-120)/(x)(x-5) = 7/8
7x^2 - 384x + 925 = 0

you should get x = 2.525084253 and x = 52.3320586

Of course, use the 52.3320586 answer.

Answer 19

it says that answer is incorrect

Answer 20

i know, thats why we didn't want to start the problem. your question is wrong.

Answer 21

i guess its the program... thanks for trying tho, i'll talk to the professor in class

Answer 22

i have the same question excepts mine says 25 instead of 24.. can someone please help me

Answer 23

Can you rewrite?

Answer 24

Mutt and Jeff need to paint a fence. Mutt can do the job alone 5 hours faster than Jeff. If together they work for 25 hours and finish only 7/8 of the job, how long would Jeff need to do the job alone?

Answer 25

\[25(\frac{1}{x}+\frac{1}{x-5})=\frac{7}{8}\]

Answer 26

yeah i got that part

Answer 27

Then you can solve for x

Answer 28

im having trying finding the common denominator

Answer 29

LCD = x(x-5)

Answer 30

thats what i had, & im still getting the wrong answer

Answer 31

You are correct, mine's solution is also giving wrong answer.

Answer 32

im getting 101.935 . what did you get?

Answer 33

57.47 and 2.38

Answer 34

But there's something wrong in the equation we are making

Answer 35

Asking for help.. hold on..

Answer 36

ok