Max and Maggie have to clean the house. It takes Max 12 hours to clean the house, while Maggie can complete the task in 4 hours. Their sister says that it will take 3 hours to complete if they work together. Explain each step in solving this equation and determine if the sister is correct or not.

Question

Mathematics

Iyana

15 June, 23:51

Max and Maggie have to clean the house. It takes Max 12 hours to clean the house, while Maggie can complete the task in 4 hours. Their sister says that it will take 3 hours to complete if they work together. Explain each step in solving this equation and determine if the sister is correct or not.

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Answers (2)

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Laylah Morgan · Answer 1

The sum of their rates is the combined rate. But we don't know the combined time. We'll solve for it. 112 + 14 = 1t In this case the LCM of the entire equation is 3*4*t, or 12t.

Multiply everything by 12t. t+3t=12 4t=12 t=3

Their sister is correct.

Charlie Harrington · Answer 2

You first take half of 12 which is 6, then you take half of 4 which is 2. you know find the answer by dividing 6 by 2. the sister is correct