Mathematics, 29.08.2019 14:20 mikeylaaliz9960
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. 1/21
c. x/21
d. 21x
Answers: 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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