Mathematics, 10.06.2021 21:50, Emptypockets451

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?

A. 21
B. X/21
C. 21x
D. 1/21

Answers: 2

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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-eight minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1? A. 21 B. X/21 C. 21x D. 1/21

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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-eight minutes. When completing the job together, which expression would be used to represent the amount of work done by person 1?

A. 21
B. X/21
C. 21x
D. 1/21