新SAT官方Daily Practise每日一题数学代数题

小站教育2017-06-16 09:59:35

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摘要:今天起,本系列将给大家带来SAT官方的每日一练真题,各个项目都有,持续更新,希望大家同步多练习。今天这里分享的是6月15日的数学代数题,一起来练习吧!

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

6月官方Daily Practice 每日一练数学,点击进入

Lisa gives her little brother Sam a 15-second (sec)head start in a 300-meter (m) race. During the race,Sam runs at an average speed of 5 m/sec and Lisa runs at an average speed of 8 m/sec, not including the head start. Which of the following best approximates the number of seconds that had passed when Lisa caught up to Sam?

A.5

B.25

C.40

D.55

重点单词:

solve [sɔlv] v. 解决,解答

multiple ['mʌltipl] adj. 许多,多种多样的

equation [i'kweiʃən] n. 相等,方程(式), 等式,均衡

(答案解析请翻页查看)


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