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2017年2月3日SAT考试每日一题(数学).

刚刚更新 编辑: 浏览次数:186 移动端

  为了让我们更好的适应SAT考试,SAT考试官网每天都会有SAT官方每日一题,下面是澳际小编为您整理的2017年2月3日SAT题目,是数学题,让我们一起来看一看这道题目吧。

  Mathematics>Standard Multiple Choice

  Read the following SAT test question and then click on a button to select your answer.

  The time it takes Erica to run one mile decreased consistently throughout her track season. She estimates that her time to run a one-minute mile decreased by about 15 seconds for every 2 weeks into the season. If Erika ran one mile in 500 seconds at the start of the season, and x weeks after the start of the season ran one mile in 425 seconds, which of the following equations best represents this context?

  A.500-7.5x=425

  B.500-15x=425

  C.500+7.5x=425

  D.500+15x=425

  澳际培训提醒各位参加准备sat考试的同学,仔细看完以上的sat考试官网题目,然后再看下面的SAT题目答案更有效哦。

  答案:D

  解析:

  Choice A is correct. The time it took Erica to run one mile decreased by about 15 seconds for every 2 weeks of the season. This is equivalent to a decrease of 7.5 seconds every week.

  If Erika trains forx weeks, 7.5x represents the total time, in seconds, that she has shaved off the time it took her to run one mile.

  Subtracting this from her starting time gives the approximate time (in seconds) it takes her to run one mile at weekx.

  500-7.5x

  Since it takes her 7 minutes and 5 seconds, or 425 seconds to run a mile afterx weeks of the season, we can create the following equation:

  500-7.5x=425

  The equation that best represents the context is 500-7.5x=425.

  以上就是澳际小编为根据SAT考试官网最新信息,为您整理的2017年2月3日SAT题目,目的是为了让我们更好的适应SAT考试,如果在备考过程中遇到任何问题,欢迎随时咨询澳际培训,为您提供最专业、最全面的解答。

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