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OpenStudy (anonymous):
Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eight minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1?
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OpenStudy (anonymous):
a. 21 b. 1/21 c. x/21 d. 21x
OpenStudy (anonymous):
b?
OpenStudy (anonymous):
Yep..
OpenStudy (anonymous):
Yes I think it will be b..
OpenStudy (shane_b):
@kllk0981: Please don't post duplicate questions. http://openstudy.com/updates/502dff99e4b08dacc0d6a581
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