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SAT官方每日一题附答案和解析[数学](2020年6月29日)

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答案:B

解析:

Choice B is correct. Karim's total meal cost consists of three parts: Karim's pretax bill, the tax, and the tip, all added together. That amount will need to be less than or equal to Karim's gift card amount.

Since c represents the cost, in dollars, of the pretax bill, it should be multiplied by 0.143 (the tax in decimal form). Since Karim has decided to tip $5, the total meal cost can be represented by the expression space c+0.143c+5.

Next, combine like c terms to get 1.143c. So, the final inequality for Karim's situation is 1.143c+5≤35.

重点单词   查看全部解释    
inequality [.ini'kwɔliti]

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n. 不平等,不平均,差异,多变性,不等式

 
multiple ['mʌltipl]

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adj. 许多,多种多样的
n. 倍数,并联

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combine [kəm'bain]

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v. 结合,联合,使结合
n. 集团,联合企业

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