Mylene can do a job in 6 days. When Mylene and Joyce work together, it would take
them days. Find the number of days if Joyce will work alone.
them days. Find the number of days if Joyce will work alone.
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Answer:
Step-by-step explanation:
( Mylene + Joyce ) 1 day work = 2/7.
Mylene's 1 day work = 1/6.
• Joyce's 1 day work = 2/7 - 1/6 = 5/42.
So, Joyce alone can do the work in 42/5.
= 8 2/5 days.
2nd question:
A positive integer is 4 less than another. The sum of the reciprocals of the two positive integer is 10/21. Find the two integers.
Answer:
3 and 7
Step-by-step explanation:
Since the numbers are integer, the numerator will be 1.
Thus, the integers must be factor of 21.
When n and m equals to 1 and 21, 21 - 1 = 20 which is a contradiction.
When n and m equals to 3 and 7, 7 - 3 = 4 which satisfy the condition.
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