问题
解答题
某租车公司拥有汽车100辆,当每辆车的月租金为3000元时,可全部租出,当每辆车的月租金每增加60元时,未租出的车将会增加一辆.租出的车每月需要维护费160元,未租出的车每月需要维护费60元.
(Ⅰ)当每辆车的月租金定为3900元时,能租出多少辆车?
(Ⅱ)当每辆车的月租金为多少元时,租车公司的月收益最大?最大月收益是多少?
答案
略
某租车公司拥有汽车100辆,当每辆车的月租金为3000元时,可全部租出,当每辆车的月租金每增加60元时,未租出的车将会增加一辆.租出的车每月需要维护费160元,未租出的车每月需要维护费60元.
(Ⅰ)当每辆车的月租金定为3900元时,能租出多少辆车?
(Ⅱ)当每辆车的月租金为多少元时,租车公司的月收益最大?最大月收益是多少?
完形填空。 | ||||
Look 1 this photo. The 2 name is John. He comes from Canada.He is thirteen. He has two 3 . The one 4 the white dress is Rose. The other one (另一个) in the yellow dress is Mary. Rose and Mary 5 eleven. They look 6 .They are twins (双胞胎). John and his sisters are all students. They have good friends in the school. 7 father and mother are both Enlish 8 . John looks like his father. He is tall and 9 a big head. Rose and Mary 10 look like their father. They look like their mother.They are all nice. | ||||
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