Mathematics - 6 October 2007

Go to this page to see the diagram.

http://i21.tinypic.com/2cqyzab.gif

Thanks!

2007-10-06 15:34:40 · 3 answers · asked by sillyboys_trucksare4girls 2

x-7/5+7/5=-x/7

And can you please show me how you solved it.

2007-10-06 15:30:41 · 4 answers · asked by Wonderer 1

helpp.. answer and problem work.

2007-10-06 15:25:26 · 2 answers · asked by lil bit 1

factor

1. 9x^2- 12x-5
2. 7x^2- 27x=26

2007-10-06 15:20:59 · 5 answers · asked by COCO CHANEL 2

please help, thanks

2007-10-06 15:20:50 · 3 answers · asked by josefina 1

How would I add 1/2x + x? I know 1/2x * x is 1/2x squared, but how would I add them? Explanation appreciated.

2007-10-06 15:02:18 · 16 answers · asked by Karina 1

Prove that:

[1/(1 - x²)] + [1/(1 - y²)] ≥ 2/(1 - xy)

given that x and y are positive real numbers using only inequalities.

2007-10-06 14:56:38 · 2 answers · asked by Akilesh - Internet Undertaker 7

tnx for da help^ ^

2007-10-06 14:49:37 · 6 answers · asked by Siela 1

Why can i not remember how to solve this sort of question. I can get maybe four steps into it and I get lost.

4-6(x+2) is greater than or equal to 5x+25

2007-10-06 14:48:31 · 6 answers · asked by amosunknown 7

i can't answer this and the question is 10.5 kilograms to grams

2007-10-06 14:41:49 · 11 answers · asked by Anonymous

2007-10-06 14:36:29 · 6 answers · asked by deannahndrsn 2

Suppose the following lottery is conducted a large number of times. There are n people (you can assume n is fairly large or you could let it be 100 or 1000 if you like) and each writes a positive integer on a piece of paper. The winner is the one who writes the smallest unique positive integer. For example, if 4 people write a 1 and 2 people write a 2 and only one person writes a 3, ther person who wrote a 3 is the winner.

So my question is, if this game is played a large number of times, which is the average of all the winning numbers.

In case you were curious, I have been prefacing some of my recent math questions with "Math Challenge:" in order to (a) signify that this is not my homework and (b) possibly add a bit of excitement =) However, unlike the previous ones, I have no idea what the answer to this is, or if there even is one, but I would be very interested in people's thoughts.

By the way, I once played this game with about 30 people and the number 2 won!

2007-10-06 14:30:59 · 3 answers · asked by Phineas Bogg 6

I am stuck on another problem as I am studying.

I would appreciate the help. I dont ike the birthday problem. I know its out of 365 days...and I get some of it...to a point.

IV. If a person is selected at random, find the probability that his or her birthday is
a) October 8
b) in October
c) on a Wednesday
d) on a day of the week starts with T.

2007-10-06 14:11:44 · 6 answers · asked by preteargraphic 1

Thanks to everyone who can help me. Please, if you can, provide me with a step by step explanation.

1. Which of the following is true for all consecutive intergers m and n such that m is less than n?
a. m is odd
b. n is odd
c. n-m is odd
d. n squared - m squared is odd
e. m squared + n squared is even

2. Two numbers are reciprocals if their product is equal to 1. If x and y are reciprocals and x is greater than 1, then y must be:

2007-10-06 14:04:37 · 3 answers · asked by Anonymous

Are there infinitely many primes of the form n^2+1?

2007-10-06 14:02:35 · 6 answers · asked by swimgirl273 2

2007-10-06 13:59:15 · 3 answers · asked by her 2

Prove that the product of all primes less than or equal to n is at most 4^n.

This is tough so I will suggest the following strategy: use induction and consider the case where n is even and n is odd separately. One case is very easy, the other is quite tricky and may require strong induction.

2007-10-06 13:59:14 · 6 answers · asked by Phineas Bogg 6

Give a bijection between the positive integers and the set of finite multisets of the positive integers. What does positive integer does {1,1,2,3} map to in your bijection?

A multiset is a like a set but can contain multiple copies of each element.

2007-10-06 13:55:57 · 1 answers · asked by Phineas Bogg 6

2007-10-06 13:50:09 · 4 answers · asked by Anonymous

If (x-1)^-1=2+(2+(2+....)^-1)^-1
Why does 2+(2+(2+....)^-1)^-1 equate to 1+x ??

e.g. (x-1)^-1=1+x

How is this done?

2007-10-06 13:47:52 · 2 answers · asked by Anonymous

this semester i have algebra 1a,
next semester i have algebra 1b. do i need to pass algebra 1a to go to algebra 1b? because passing algebra 1a doesn't seem possible right now.

2007-10-06 13:29:25 · 7 answers · asked by Anonymous

how do I find the domian, range and zeros of this function: f(x)= Sq. root of x^2 - 16??

Thanks for the help!

2007-10-06 13:28:07 · 3 answers · asked by Mia16 3

I'm working on some ACT problems and could use a little help. The problem is kind of long.If you could explain the answers to me that would be so great. Thank you so much.

1. In teaching a lesson on the concept of thirds, Mr. Chu uses a divide and set aside procedure. He starts with a certain number of colored disks, divides them into 3 equal groups and sets 1 group aside to illustrate 1/3. He repeats the process by taking the disks NOT set aside, dividing them into 3 equal groups, and setting one of these groups aside. If Mr. Chu wants to be able to complete the divide and set procedure at least four times (without breaking any of the disks into pieces) which of the following is the minimum number of colored disks she can start with.

2007-10-06 13:22:06 · 1 answers · asked by Anonymous

x = 2, y = -3
2x^2 + 3xy

and

x/3 + 1 = x-4

and

2x + 3 = 3x + ____ x=-8
what number goes in the blank?

please explain how u got the answer. thanks. please!! 10points!

2007-10-06 13:21:09 · 3 answers · asked by Anonymous

16x^2y / 48xy^3

5xy-3y / 9-15x

x^2 + 5x + 6 / x^2 + 8x + 15

3x^2 - 12x / 6x^3 - 24x^2 + 24x

Thanks you so much for anyone who takes the time to help. I am having a hard time learning this stuff on my own. Thanks again.

2007-10-06 13:04:10 · 5 answers · asked by ♥ ღAngelicaღ♥ 2

hi! i need help learning about binary numbers. when I was younger, I was showed how to get binary numbers in the form of a game. I really understood it, but now i totally forgot. I need to know how to change a whole number into a binary number, and how to change it back. I understand the concept, and I can add, but i have no idea how to subtract and multiply, and divide. please help!

2007-10-06 12:48:34 · 3 answers · asked by Lisa L 3

Does anybody know ?

2007-10-06 12:42:34 · 3 answers · asked by XloveX 1

Determine if there is something wrong in these numbers; explain your answer?

a. 1110110 ----- to base 2 ( binary )

b. 185 ------------ to base 8 (octate )

c. FF ------------- to base 16 ( hexadecimal )


Is there something wrong with these numbers ? i dont get it :(

2007-10-06 12:40:59 · 1 answers · asked by XloveX 1

How can $70,000 be invested, part at 4% annual simple interest and the remainder at 10% annual simple interest, so that the interest earned by the two accounts is equal at the end of the year?

a. $50,000 invested at 4%; $20,000 invested at 10%
b. $40,000 invested at 4%; $30,000 invested at 10%
c. $30,000 invested at 4%; $40,000 invested at 10%
d. $20,000 invested at 4%; $50,000 invested at 10%

2007-10-06 12:36:49 · 6 answers · asked by . 1

2007-10-06 12:32:40 · 8 answers · asked by . 1