Question 1024339
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Chere can do 2 jobs in 3 days, and Stacey can do 5 jobs in 6 days. Chere works for 3 days, and then Stacey begins to help. 
How many days will it take them working together to do 74 jobs? -- Thank you for any support :) 
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C's rateof-work is {{{2/3}}} jobs per day.

S's rateof-work is {{{5/6}}} jobs per day.

Working for 3 days, Chere completed {{{3*(2/3)}}} = 2 jobs.
And 74 - 2 = 72 jobs remained.

Their combined rate-of-work is {{{2/3 + 5/6}}} = {{{4/6+5/6}}} = {{{9/6}}} jobs per day.


The answer to the question is {{{72}}} : {{{9/6}}} = . . . 

Please calculate it yourself.
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