2019新SAT数学练习题及答案解析6

>>SAT考试模拟题：2019新SAT数学练习题及答案解析6

>>SAT考试经典课程推荐

Adolfo wants to send his friend a rectangular poster with a width of 65 centimeters (cm) and alength of 92 (cm). He will mail the poster in a container in the shape of a right circular cylinder with a volume of 5200 cubic centimeters (cm^3). The height of the container is the same as the width of the poster. Which of the following is closest to the largest radius the container could have?

将长92cm，宽65cm的长方形海报要放置在一个5200立方厘米的圆柱形容器里。已知该容器高与海报的宽一样。求以下哪个值最接近该圆柱形容器的最 大半径?

A.4cm B.5cm C.8cm D.25cm

答案：B

解析： Choice B is correct.

-3(x+3)-8=6-4x

Which of the following is the solution to theequation shown?

A.x=11 B.x=-11 C.x=23 D.x=-23

答案：C

解析：Option C is correct. To solve -3(x+3)-8=6-4x, first use the distributive property on the left side of the equation to yield -3x-9-8=6-4x. Combining like terms on both sides of the equation yields -3x-17=6-4x. Finally, isolating x on one side of the equation reveals that x=23.

重点单词

equation [i'kweiʃən]n. 相等，方程(式), 等式，均衡

solution [sə'lu:ʃən]n. 解答，解决办法，溶解，溶液

yield [ji:ld]n. 生产量，投资收益 v. 生产，屈服，投降

option ['ɔpʃən]n. 选择权，可选物，优先购买权v. 给予

property ['prɔpəti]n. 财产，所有物，性质，地产，道具

solve [sɔlv]v. 解决，解答

In the figure shown above, BD bisects AC at point B. What is the perimeter of quadrilateralAECD?

已知在上图中，BD平分AC于B,且BD与AC垂直，线段CE长8cm，AD长为16cm，求四边形AECD的周长。

A.48cm

B.46cm

C.38cm

D.34cm

答案：A

解析：

Choice A is correct.

BD平分且垂直于AC，可以推导出三角形AEC,ADC为等腰三角形，从而AE=CE=8cm，CD=AD=16cm。故四边形AECD周长为8+8+16++16=48cm。

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