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　　SAT数学每日一练

　　是关于Julio在菜市场卖菜的数学故事

　　While shopping at his local vegetable market, Juliopurchases 5/4 pounds of zucchini and 9/4 pounds of kale. He spends a total of $7.50 on these two types of vegetables. Which of the following equations best models the cost per pound, in dollars, of zucchini, z, and the cost per pound, in dollars, of kale, k, that Julio purchases?

　　A.(14/4)(z+k)=7.50/2

　　B.(5/4)z+(9/4)k=7.50/2

　　C.(14/4)(z+k)=7.50

　　D.(5/4)z+(9/4)k=7.50

　　答案：D

　　解析：

　　Choice D is correct.

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