sat 史上最难最崩溃的题目.关键是我看不懂看题：Barb's motor scooter has a 2-gallon gas tank and can travel "m" miles on 1 gallon of gas.If gas costs $1.25 per gallon and Barb spends "d" dollars to fill the tank; which of the following represents the amount of gas,that was in the tank before she filled it?选项：A:2/1.25B:(d/1.25) -2C:2- (d/1.25)D:2- (md/1.25)E:2- {(m/d)/1.25}别和我说排除法~用了个很惊悚的题目,见谅感谢回答的所有人
问题描述：
sat 史上最难最崩溃的题目.关键是我看不懂
看题：
Barb's motor scooter has a 2-gallon gas tank and can travel "m" miles on 1 gallon of gas.If gas costs $1.25 per gallon and Barb spends "d" dollars to fill the tank; which of the following represents the amount of gas,that was in the tank before she filled it?
选项：
A:2/1.25
B:(d/1.25) -2
C:2- (d/1.25)
D:2- (md/1.25)
E:2- {(m/d)/1.25}
别和我说排除法~
用了个很惊悚的题目,见谅
感谢回答的所有人
答
Barb的摩托车邮箱可以装2加仑汽油，1加仑汽油可以行驶m英里。如果现在汽油的单价是￥1.25美元/加仑，Barb花了d美元加满油箱。下面的哪个公式可以表示Barb摩托车油箱加油前的油量？
答案当然是C啦
加油前=2（加油后满油箱）-d/1.25（d美元油的体积）
答
想将题目给你翻译一下：Barb 的摩托车的油箱可以装2加仑汽油,并且1加仑汽油可以使车行驶m米.如果每加仑汽油要花费1.25美元,Barb 花了d美元来加他的油箱加满,下面那一个选项代表她加满油之前油箱中的汽油的总量.Barb...