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SAT模拟考试题:SAT数学练习题(13)

2016-08-11 16:52:25来源:网络

  Question #9: If x + 4y = 6 and x - 2y = 3, which of the following statements is not true?

  (a) y = 1/2

  (b) x = 4

  (c) y = 2

  (d) xy = 2

  (e) x + y = 9/2

  Answer: In order to find the values of x and y, we multiply the second equation by 2 and add the 2 equations:

  x + 4y = 6

  2x - 4y = 3

  3x = 12 and x = 4, y = (6 - 3)/4 = 1/2.

  y = 2 is the only equality that is false.

  Question #10: Prizes totaling $60,000 were awarded unequally between 3 contestants. Which of the following choices could be the highest prize?

  (a) $5,000

  (b) $10,000

  (c) $15,000

  (d) $25,000

  (e) $65,000

  Answer: The highest prize should be higher than one third of $60,000 and lower than $60,000. The only answer that satisfies these conditions is $25,000.

  更多SAT模拟考试题及备考资料敬请查看SAT真题栏目。


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本文关键字: SAT模拟考试 SAT数学

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