标题: 求教数学菜鸟一枚，OG数学咋看不懂呢 [打印本页]
作者: captainer 时间: 2013-4-8 13:47 标题: 求教数学菜鸟一枚，OG数学咋看不懂呢
我问的可能都很简单~~但大家不要嫌弃我啊~~
想问问翻译
1.
The numbers of cars sold at a certain dealership on six of the last seven business days were 4, 7,2,8,3,and6,respectively. If the number of cars sold on the seventh business day was either 2,4, or 5, for which of the three values does the average number of cars sold per business day for the seven business days equal the median number of cars sold per day for the seven days?
2.
A straight pipe 1 yard in length was marked off in fourths and also in thirds. If the pipe was then cut into separate pieces at each of these markings, which of the following gives all the different lengths of the pieces, in fractions of a yard?
3.
List T consists of 30 positive decimals, none of which is an integer, and the sum of the 30 decimals is S. the estimated sum of the 30 decimals, E, is defined as follows. Each decimal in T whose tenths digit is even is rounded up to the nearest integer, and each decimal; E is the sum of the resulting integers. If 1/3 of the decimals in T have a tenths digit that is even, which of the following is a possible value of E-S?
4
In an electric circuit, two resistors with resistances x and y are connected in parallel. In this case, if r is the combined resistance of these two resistors, then the reciprocal of r is equal to the sum of the reciprocals of x and y. what is r in terms of x and y?
5.
A store currently charges the same price for each
towel that it sells. If the current price of each towel
were to be increased by $1, 10 fewer of the towels
could be bought for $120, excluding sales tax. What is
the current price of each towel?
作者: ItalyPirlo 时间: 2013-4-8 20:45
1、前六天分别卖了4、7、2、8、3、6辆车，第七天可能卖了2、4、5辆，问第七天卖了多少辆车可以使得七天卖出车辆数的均值等于中值。
2、一个1 yard的直管，同时被四等分和三等分标记，如果管子在每一个标记处被截断，问以下哪个选项把所有不同的长度列了出来。
3、List T中有30个正的小数，没有一个是整数。这三十个小数的和是S，它们的一种估计值之和是E。这种估计是这么做的：把三十个小数里十分位
为偶数的小数四舍五入为整数，然后求和。问如果T中1/3的小数里十分位为偶数，问以下哪个值可能是E-S。
4、在一个电路里，两个电阻值为x和y的电阻并联，这两个电阻的阻值等价为r，1/r=1/x+1/y，问r如何用x、y表示。
6、一家商店对它出售的毛巾标了相同的价格，如果现在的价格涨1块钱，120块能买到的毛巾就比原来少了10块，问现在毛巾的价格。
作者: captainer 时间: 2013-4-9 06:18
~~~谢谢！！！！！
作者: dreamlollip 时间: 2013-4-10 21:02
If n denotes a number to the left of 0 on the number line such
that the square of n is less than 1/100, then the reciprocal of
n must be
(A) less than -10
(B) between -1 and
(C) between and 0
(D) between 0 and
(E) greater than 10
这题能帮我翻译翻译吗？谢啦
作者: togetherus 时间: 2013-4-11 21:03
如果n表示的是数轴左边的数，并且n的平方小于1/100，那么n的倒数必须是
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