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SAT模拟考试题:SAT数学练习题(20)

2016-08-11 17:03:53来源:网络

  Question 8: Last year, the price of a computer monitor was $300.What is the percent increase in price,

  if it is available now at $360?

  Answer: 20%

  Explanation: The percent increase in price is the actual change in price,

  divided by the original price, and multiplied by 100.

  ($360 - $300)·100/$300 = 20%

  Question 9: In the x, y plane, what is the area of the triangle created by the x axis, the y axis and the y = (-5/4)x + 5 line?

  Answer: 10

  Explanation:

  y = (-5/4)x + 5 intersects the y axis at x = 0 and y = 5

  y = (-5/4)x + 5 intersects the x axis at y = 0 and x = 4

SAT模拟考试题:SAT数学练习题

  The triangle created by the x axis, the y axis and the y = (-5/4)x + 5 line is a right triangle.

  The area of the triangle is A = (1/2)·4·5 = 10.

  Question 10: If a coin is flipped twice, what is the probability that it will land heads at least once?

  Answer: .75

  Explanation:

  The 4 possible combinations are (heads,heads), (heads,tails), (tails,heads) and (tails,tails).

  Three of these four combinations satisfy the conditions that the coin lands heads at least once.

  The probability is 3/4 = .75.

  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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