Asked by James

Tammy can do a certain job in 6 hours. Kris can do the same job in 8 hours. If Tammy and Kris work together to complete the same job, how many hours will it take for them to complete it?
Answered by Steve
1/x = 1/8 + 1/6
Answered by laura
compute the cost to remove 25% of the air pollutants
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