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Contact [7]
3 years ago
5

Jeff can build 7 birdhouses in 5 hours. Use a

Mathematics
1 answer:
nika2105 [10]3 years ago
6 0

Answer:

21 hours

Step-by-step explanation:

We can use a ratio to solve

7 houses       30 houses

-------------  = --------------

5 hours         x hours

Using cross products

7x = 5*30

7x = 150

Divide by 7

7x/7 =150/7

x =21.42857143

Rounding to the nearest whole number

x = 21 hours

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