algebra

Henry can paint a house in 5 days and Jose can do the same work in 4 days. If they work together,how many days will it take them to paint the house?

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1. Henry's rate = house/5
Jose's rate = house/4
combined rate = house/5 + house/4
= 9house/20

time at combined rate = house/(8house/20)
= house(20/8house)
= 20/8
= 2.5

it will take 2.5 days

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