It takes Cynthia 11 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Mandy 5 hours.

Question

It takes Cynthia 11 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Mandy 5 hours. How long would it take them working together? (Round your answer to two decimal places.)

Kunduz · Accepted Answer

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