SAT考试数学题解析2

每日一题：

　　Mathematics>Standard Multiple Choice

　　Read the following SAT test question and then click on a buttonto select your answer.

　　An art gallery displays a large painting in the center of a wallthat is 24 feet (ft) end text right parenthesis wide. The painting is 10ftwide. Which of the following equations can be used to find the distance, x, infeet, from either end of the wall to the corresponding edge of the painting?

　　A. |x-10|=12

　　B. 2|x-12|=10

　　C. 2|x-10|=12

　　D. |x-12|=10

　　答案：B

　　解析：

　　Choice B is correct.The center of the wall is a distance of1/2*(24)=12 feet from the left end of the wall. If x is the distance from apainting edge to its corresponding end of the wall, then |x-12| is the distancefrom the painting edge to the center of the wall.

　　If the painting is centered, then 2|x-12| represents the widthof the painting.

　　Since the painting is 10ft wide, we have 2|x-12|=10.

    欲了解更多雅思、托福、 SAT、SSAT、 COPE等语言类标准化考试培训课程及加拿大名校申请服务，欢迎就近至环球教育多伦多学校 - 北约克North York校区、列治文山Richmond Hill校区进行详细咨询，或访问多伦多环球教育唯一官方网站： http://toronto.gedu.org；

    同时您也可以扫描环球教育加拿大官方微信二维码，与雅思大神级名师互动问答，考前免费预测答疑，为您的考试保驾护航。 请致电官方咨询专线647-352-6616预约免费入学测评与试听服务。