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SAT数学Problem Solving练习题（26）

互联网2017-07-26 13:31:26

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摘要：下面是小站SAT频道为大家整理了SAT数学Problem Solving练习题(26)，供考生们参考，以下是详细内容。

以下是小站SAT频道为大家整理了SAT数学Problem Solving练习题(26)，供考生们参考，以下是详细内容。

Question 26: While competing in a marathon event, John is behind Mike by 100 yards. John runs (x - 2) yards while Mike runs (x + 10) yards. What is the new distance between them?

(a) 112 yards

(b) 108 yards

(c) 102 yards

(d) 110 yards

(e) The answer is a function of x

Solution: We can reference all distances to the point where John was at the time t1, when the distance between them is 100 yards.

After John runs (x - 2) yards, he is (x - 2) yards from the reference.

After Mike runs (x + 10) yards, he is 100 yards + (x + 10) yards = (x + 110) yards from the reference.

The distance between them will be (x + 110) - (x - 2) = 112 yards.

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