Question

If Max takes 3 hours to wash a car an Tia takes 4 hours to wash the same car, how long will it take them to wash the car together?

Write a rational equation based upon the word problem you created.

Answer 1

lol, Max and Tia dont wash the car and just drive to the restaurant :)

Answer 2

define the hourly rate for each person, then add the rates to determine the hourly rate combined .... then flip the results

Answer 3

You lost me, would it be something like \[\frac{ 1 }{ 3 }+\frac{ 1 }{ 4 } = \frac{ 1 }{ x }\]?
Yeah, they also dont take so many hours to drive a car xD

Answer 4

:) youve got the unit rates good, but its not going necessary equal a 1/x at least not at first

Answer 5

1/3 + 1/4 = 7/12

7/12 = 1/x when x = 12/7 which is the flip

Answer 6

12/7 hours * 60 minutes/1hour would be a conversion rate to minutes

12/7 hours * 60 minutes/1hour * 60 seconds/1 minute would relate it to seconds ... depending on how accurate you need to format your restuls

Answer 7

Then whatever I get would be the result or would I need to do another step?

Answer 8

well, we can say for sure that it takes 12/7 hours for them to complete the job .... how you format that is up to whoever is grading it

Answer 9

Oh alright, they dont really ask for a fomat just to solve the equation

Answer 10

\[\frac{1job}{3hrs}+\frac{1job}{4hrs}=\frac{7jobs}{12hrs}\]

Answer 11

Thank you very much. Kind... sir?

Answer 12

youre welcome

and since the ratio is 7 jobs to 12 hrs: divide both sides by 7 gives us

7/7 jobs in 12/7 hours

1 jobs in 12/7 hours

Answer 13

you have to add the fractions ....

Answer 14

\[\frac13+\frac14\]
\[\frac44\frac13+\frac33\frac14\]
\[\frac{4}{12}+\frac{3}{12}\]
\[\frac{4+3}{12}\]

Answer 15

Oh, thank you!

Answer 16

i just assumed you were adept already at these basic mathing skills :)

Answer 17

I guess i wasnt, i was doing it blindly really. Math shouldnt be done that way