Ask Question
24 December, 05:53

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

+5
Answers (2)
  1. 24 December, 06:32
    0
    When completing the job together, the expression that would be used to represent the amount of work done by one person is 1/21. The correct answer is B.

    1/21 + 1/28 = 1 if done together.
  2. 24 December, 09:46
    0
    The correct answer is:

    C) x/21

    Explanation:

    Since Person 1 can complete the entire job (100% = 1/1 = 1) in 21 minutes, this person can complete 1/21 of the job per minute. This is Person 1's rate. If x is the amount of time it takes both people together to finish the job, then the amount of work Person 1 does would be (1/21) (x) = x/21.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “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 ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers