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SAT模拟考试题:SAT数学练习题(16)

2016-08-11 16:56:26来源:网络

  Answer: The angle between the two sides should be higher than 0 degrees and the third side should be higher than 7 - 6 = 1. The perimeter should be higher than 7 +6 +1 = 14

  The angle between the two sides should be lower than 180 degrees and the third side should be lower than 7 + 6 = 13. The perimeter should be lower than 7 + 6 + 13 = 26

  (c) is the only value between 14 and 26.

  Question #5: What is the line in the coordinate plane that is perpendicular to y = m · x + n and passes through the origin?

  (a) y = (-1/m) · x

  (b) y = (-1/m) · x - 1/n

  (c) y = (-m) · x

  (d) y = (-m) · x - n

  (e) y = (-2m) · x

  Answer: The line y = a · x + b, passes through the origin (0,0), so 0 = a · 0 + b, b = 0

  (b) and (d) answers excluded, a simple test can be done to find the right answer, e.g. y = 2 · x will be perpendicular to y = -(1/2) · x. The right answer is (a).

  Question #6: Given the table below, which of the following answers describes the relation between x and y?

  xy

  01

  25

  417

  526

  (a) y = x + 5

  (b) y = x2 + 1

  (c) y = 2 · x + 1

  (d) y = 3 · x - 1

  (e) y = 4 · x + 1

  Answer: From the pair x = 0 and y = 1, we realize that only answers (b), (c) and (e) could be correct answers.

  Examining the 3 choices, we find that the correct answer is (b)

  Question #7: The median m divides the ABC triangle in 2 triangles, ABM and ACM. What is the ratio between the areas of the 2 triangles, AreaABM/AreaACM ?

SAT模拟考试题:SAT数学练习题

  (a) 1

  (b) 1/2

  (c) 2

  (d) It cannot be determined from the information given

  (e) 3

  Answer: The areas of the 2 triangles will be equal because they are both (1/2) · h ·(BC/2), where h is the altitude. The correct answer is (a).

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本文关键字: SAT模拟考试 SAT数学

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