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Mathematics, 19.03.2021 14:10 desmiyoungmoore

If Jan can buy 12 copies of a certain book for $40, what is the unit rate for cost per copy? How much would it cost her to buy 18 copies at the same rate?

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If Jan can buy 12 copies of a certain book for $40, what is the unit rate for cost per copy? How muc...

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