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18-01-2019
Mathematics

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How can you writhe a proportion that solves a problem in real life?

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mathstudent55 mathstudent55

18-01-2019

In a store, you can buy 5 apples for $7, how much do 9 apples cost?

Proportion: 5 apples is to $7 as 9 apples is to x.

5/7 = 9/x

5x = 7 * 9

5x = 63

x = 63/5

x = 12.6

The cost of 9 apples is $12.60

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