课程咨询
美国本科留学资料领取

扫码添加助教

免费领取

备考资料大礼包

扫码关注公众号

SAT模拟考试题:SAT数学练习题(17)

2016-08-11 16:57:28来源:网络

  Question #7: A square with the side equal to square root of 2 is inscribed in a circle. What is the area outside the square that is inside the circle?

  (a) ¶ + 1

  (b) ¶ - 1

  (c) ¶ - 2

  (d) ¶

  (e) ¶ + 2

  Answer: The diagonal of the square is √2 · √2 = (√ 2)2 = 2. This is also the diameter of the circle.

  The area outside the square and inside the circle is:

  Areacircle - Areasquare = ¶ · 22/4 - 2 = ¶ - 2

  Question #8: What is the value of (x + 2y) 2 if x 2 + 4 · y 2 = 2 and x · y = 3

  (a) 13

  (b) 14

  (c) 16

  (d) 18

  (e) 22

  Answer: (x + 2y) 2 = x 2 + 4 · y 2 + 4 · x · y = 2 + 12 = 14

  Question #9: What is the value of the median of an equilateral triangle with all sides equal to 5?

  (a) (5/2) · √3

  (b) 5 · √3

  (c) (5/2) · 3-3

  (d) 5/2

  (e) 5

  Answer: The median divides the equilateral triangle in two right triangles. Conform to the Pythagorean theorem, wherein the sum of the squares of the two legs is equal to the square of the hypotenuse,

  m2 + (5/2)2= 52

  m2 = 52 - (5/2)2 = 52 - 52/4 = (3/4) · 52

  m = (5/2) · √3.

  Question #10: A parameter is measured during a scientific experiment and the results are -12, 4, -8, 10, 2, 2, 0, -4 and 2. The median and the average of these numbers are:

  (a) median = 0, average = -4/9

  (b) median = 0, average = 4/9

  (c) median = 2, average = -4/9

  (d) median = 2, average = 4/9

  (e) median = 2, average = 2/9

  Answer: You must arrange the numbers in order: -12, -8, -4, 0, 2, 2, 2, 4, and 10.

  The median will be number in the middle of the row, that is 2.

  The average will be (-12-8-4+0+2+2+2+4+10)/9 = -4/9.

  更多SAT模拟考试题及备考资料敬请查看SAT真题栏目。


SAT水平能力测试【0元免费测试】

本文关键字: SAT模拟考试 SAT数学

美本留学资料大礼包

微信扫描二维码 回复【美本资料】

机考SATCB官方样题|可汗练习题|AP全科大纲/备考资料包

更多资料
更多>>
更多内容

添加美本助教号

自动领取备考资料大礼包

1. 打开手机微信【扫一扫】,识别上方二维码;
2.添加【美本助教】,自动领取留学备考资料大礼包。

可汗学院新SAT题目完整版

微信扫描下方二维码 即可获取

SAT1500分录播课(旗舰版+1对1) 托福精讲录播课(旗舰版) 托福8-10人直播VIP小班
更多>>
更多公开课>>

2023美本留学资料免费领取

微信添加美本助教

新东方美本助教
更多>>
更多资料

添加新东方在线美本助教号

自动领取备考资料大礼包

1. 打开手机微信【扫一扫】,识别上方二维码;
2.添加【Ella助教】,自动领取留学备考资料大礼包。