北美JJ, 9/22, 一战770

mid-ocean

 

Argument:

“Our factory in Cookville is our most advanced and efficient. It is capable of producing ten drill bits for each dollar of production costs, whereas none of our other factories can produce more than seven drill bits per dollar of production costs. Therefore, we can reduce our overall drill bit production costs by devoting the Cookville factory entirely to drill bit production. Since reducing the production costs of individual machine parts is the only way to achieve our larger goal of reducing our overall production costs, dedicating the Cookville factory entirely to drill bit production and shifting all other machine part production to our other factories will help us to attain that larger goal.”

 Issue:

All groups and organizations should function as teams in which everyone makes decisions and shares responsibilities and duties. Giving one person central authority and responsibility for a project or task is not an effective way to get work done.”

 Math

 

 

1. 说(x²-5x-1)²-25能写成(x-a)(x-b)(x-c)(x-d)，问abcd等于多少？

2.  三角形ABC，有一条边是2，AB等于BC，有一个角是60°，问周长

3. 0<x<1,x为小数,is tenth digit of x nonzero?

A 16x是整数

B 8x是整数

4. 求4+5/a最接近的整数(nearest rounded to)

A a>10 

B 0<a<20

5. 说一帮学生选课，选历史地理政治的分别是A，B，C个人(ABC 都是具体数字)，问选其中2科的是多少人？

I. 三科都选的是D人（具体数）

II.总共52个人参加了选课

6.People who earn more than 40000 for their salaries should submit 6% of 40000 and x% for the part exceeding 40000. If a people earn50000 and submit 2600, what is X?

7.x和y在数轴上，x在原点的左边，问x和y之间的距离

A..4是x和y的halfway

 B.0是x和y/2的halfway

8. 三个班ABC，有9个人同时上A和B，14个人同时上A和C，没人同时上B和C，问有几个学生至少上一个班？

条件一：三个班人数相等

条件二：三个班各自的人数相加为325

9. f(a)=10a^2, what is the value of f(a)f(b)

A. f(a)=10

B. f(a)f(b)=f(ab)

I chose B

10. 一个数等于2的51次方，另一个数等于2的x次方乘以3的立方，二者有相同个数的正整数因子，问x等于多少

11.  x y z的标准偏差是a，问下面哪一些标准偏差也是a？

1、x+1 y+1 z+1

2、2x 2y 2z

3、x平方 y平方 z平方

mid-ocean

12.一条线y=x+a在直角坐标系内，同时与x和y轴相交，构成一个三角形，面积大于1，问下列哪些a的取值范围可以保证上述条件

13. 设f(x,y)=x的阶乘/(x-y)的阶乘；那么满足f(6,y)>20的y的最小值是多少

14.(360^2)^3=?

I chose 2^18x3^12x5^6

15.  一个鞋子店，第一双是FULL PRICE，第二双可以50%OFF，PROVIDED IS LESS THAN THE FIRST PAIR（这里开始迷茫）。然后又说第二双鞋子的全价比第一双的全价少35%,，最后问你两个一起买的DISCOUNT。

20%

16.2 to 40 inclusive the sum of consecutive even number is 420

   1 to 39 inclusive the sum of consecutive odd number?

17. 买票，大人6块，小孩3块，问卖票的能否卖到2500

1) the number of children  

2) 卖了850张

B

18.  7个人，岁数分别是22，24，28，32，33，37，X。问X是多少？

1）   range是17

2）   median是

1.     19. n=km+b,n<0,m>0，b>0怎么怎么的，说b叫余数，然后问-100的余数是多少

20. 20. t<t^3<t^2 what is the possible value of t

I chose -1/2

21. A circle, center at (0,0), radius 50. P(50,0), Q is on the circle(didn't shown in the picture), What is PQ?

A. Q, x coordinate(-40)

B. Q. y coordinate (-30)

22. 2y=5

1. slope is 0

2. parallel to X axis

3. parallel to Y axis

23. Y country has 6o million people. It has 6 district, K,L,M,N,O,P, each district's population is greater than or at least equal to the next district. N has 21% of the total population, P has 2 million, what is the greatest number of population of O

24. D点和E点分别为中点 半径为r 求阴影部分面积

面积等于一个四分之一减掉等腰直角三角形

记得乘以二 因为是两个半圆 答案r^2(pai-1)/2 25. (1,2) is on the y=ax^2+bx+c, is (-1,2) also on it? A. f(a)=f(-a) for all f(x)=ax^2+bx+c B. b=0 26. k@ = k+1 if k is odd, k-1 if k is even. Is (a@)^2x(b@) even? A. a is even B. b is odd 27.要求 5X-3Y=? A.(x/0.3)-(Y/0.5)=0.1 B.(x/0.5)-(Y/0.3)=0.1 28. |x-5|<2 ,which one couldn't be x x=-7 29. car 50 mile per hour, 30 mile per gallon, 12 gallon tank, 5 hours, what is the percentage of gas left in tank? math 51, Verb 42 Math about 1/2 are DS. Verb finished about 20 min. early, seemed no adverse effect Thanks for all the information through the CD.

记得乘以二 因为是两个半圆

答案r^2(pai-1)/2

25. (1,2) is on the y=ax^2+bx+c, is (-1,2) also on it?

A. f(a)=f(-a) for all f(x)=ax^2+bx+c

B. b=0

26. k@ = k+1 if k is odd, k-1 if k is even. Is (a@)^2x(b@) even?

A. a is even

B. b is odd

27.要求 5X-3Y=?
A.(x/0.3)-(Y/0.5)=0.1
B.(x/0.5)-(Y/0.3)=0.1

28. |x-5|<2 ,which one couldn't be x

x=-7

29. car 50 mile per hour, 30 mile per gallon, 12 gallon tank, 5 hours, what is the percentage of gas left in tank?

math 51, Verb 42

Math about 1/2 are DS. Verb finished about 20 min. early, seemed no adverse effect

myice

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