An antiques dealer bought c antique chairs for a total of x dollars. The dealer

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问题 An antiques dealer bought c antique chairs for a total of x dollars. The dealer sold each chair for y dollars.
(a)Write an algebraic expression for the profit, P, earned from buying and selling the chairs.
(b)Write an algebraic expression for the profit per chair.

选项

答案 (a)P = cy - x(b)Profit per chair:[*]

解析

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An antiques dealer bought c antique chairs for a total of x dollars. The dealer

Julie:Iboughtthisdresstwoyearsago.Itsstylewentoutalready.Jack:Oh,

Withallthemagazines______,Ileftthepostoffice.A、boughtB、buyingC、tobeb

Ted:Hi,Christine.______?Christine:Hi,Ted.Ijustboughtanewcampingtent.

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ThenovelIboughtlastweekisworth______,Ithink.A、readingB、beingreadC、to

YesterdayMr.Smithbought______EnglishdictionarywhileIgotaRussiannoveli

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Aninvestorbought200sharesofstockinABCDcompanyin1990.By1992,theinv

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