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标题: gwd-12-35疑惑 [打印本页]

作者: dingzhiyin19 时间: 2006-5-26 07:20 标题: gwd-12-35疑惑

Q35:

The total charge to rent a car for one day from Company J consists of a fixed charge of $15.00 plus a charge of $0.20 per mile driven. The total charge to rent a car for one day from Company K consists of a fixed charge of $20.00 plus a charge of $0.10 per mile driven. Is the total charge to rent a car from Company J for one day and drive it x miles less than $25.00 ?

(1) The total charge to rent a car from Company K for one day and drive it x miles is less than $25.00.

(2) x < 50

答案D，我选B

看完讨论贴，没人提条件1, 我认为知道条件1（K公司）无法判断J公司啊，我是不是哪没看到？

作者: mingzhu11 时间: 2006-5-27 06:07

（1）20+0.1x<25,解出x<50,同（2）

条件（1）来说，J和K相同的就是x miles

所以选D

作者: dingzhiyin19 时间: 2006-5-29 07:14

i see,thanks !!!!

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