10-04-2017
Mathematics

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I don't know how to start or do number 21. I'm completely lost. I know the answer is 15 from the answer key.

I dont know how to start or do number 21 Im completely lost I know the answer is 15 from the answer key class=

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ivanzud ivanzud

10-04-2017

Use ratios. 80/12=100/x. x=15.

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