Mathematics, 06.07.2019 22:00 23stanforthb
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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Person 1 can do a certain job in twenty-one minutes, and person 2 can do the same job in twenty-eigh...
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