Mathematics - 19 July 2007

Do you think a graph is worth a thousand sets of data (or words).?

2007-07-19 10:58:53 · 2 answers · asked by Anonymous

A circle by any other name is just as round.

2007-07-19 10:55:09 · 5 answers · asked by Anonymous

curious as to decimal number base systems

2007-07-19 10:55:07 · 4 answers · asked by Book of Changes 3

I'm trying to help my 5th grader with his math homework and I can't! Can anyone please post basic information about what number cubes are and why they are sometimes called seven cubes? Thanks for your help.

2007-07-19 10:50:01 · 3 answers · asked by lili 1

Define max(f,g) and min(f,g) as max(f,g)(x) = max {f(x),g(x)} and min(f,g)(x) = min {f(x),g(x)}. Show that max(f,g)=(1/2)*(f+g)+(1/2)*|f-g| and min(f,g)=(1/2)*(f+g)-(1/2)*|f-g|. (You can show this by first showing that for all m,n belonging to R, max{m,n}=(1/2)*(m+n)+(1/2)*|m-n|. Do this by considering the two cases m>=n and m

2007-07-19 10:34:02 · 2 answers · asked by news4van 1

2007-07-19 10:17:51 · 7 answers · asked by finding.4ever 1

What is the solution to 8/2i? Is it 4i or -4i? Please show me which is correct, thank you.

2007-07-19 10:16:47 · 3 answers · asked by jumba 1

Let (X, M, u) be a measure space. The definition of the Lebesgue integral over X for a function defined on X and with values in [0, oo] is given in terms of simple functions, that is,
Int f du = supremum {Int phi du | phi is a measurable simple function satisfying 0 <= phi <= f}. Some authors require phi to take on only finite values, but others allow phi to take on oo. It's not hard to show that in both cases the value of Int f du is the same. But if we allow simple functions to take on oo, then the standard proof of the Monotone Convergence Theorem, the one due to H. Levy, is not valid, Because, for c in (0, 1) and phi a measurable simple function such that 0 <= phi <= f, we define X_n = {x in X | f_n(x) >= c phi(x)}, n=1,2 ,3 ...f_n being a monotone increasing sequence of measurable functions on X. If we require phi to have only finite values, then X = Union X_n. But if we allow phi to take on oo, then this is not true. That's the reason for my question.

2007-07-19 09:50:36 · 2 answers · asked by Steiner 7

Exapmle(3x-2x^2)(5+4x)

2007-07-19 09:41:19 · 7 answers · asked by finding.4ever 1

Use the Principle of Mathematical Induction to prove that
1 - 2 + 2^2 - 2^3 +...+ (-1)^x * 2^x = [2^(x+1)*(-1)^x + 1] / 3
for all positive integers n

2007-07-19 09:41:05 · 2 answers · asked by Anonymous

2007-07-19 09:38:27 · 6 answers · asked by Tracy T 1

for algebra one, i suck at math... heres what im talking about (x-y)(6x+4y)
anyone?

2007-07-19 09:29:43 · 7 answers · asked by jess 1

2007-07-19 09:28:48 · 6 answers · asked by deannahndrsn 2

Let X e a random variable with mean mu=100 and standard deviation sigma=10. Determine the proportion of values of X that fall within the following intervals.
a) (90, 110)
Please explain your answer so I can learn this material...thanks

2007-07-19 09:26:02 · 3 answers · asked by C K 3

For example

5x-2/x^2+1

2007-07-19 09:19:32 · 5 answers · asked by finding.4ever 1

i think its 90% but im not sure, can someone help please, thanks :)

2007-07-19 09:14:39 · 7 answers · asked by gigopicon 1

how do i work out percentages on a calculator. if 40 out of 53 people agree with something what percentage is that.

2007-07-19 09:10:10 · 16 answers · asked by danny c 2

thank you

2007-07-19 09:09:18 · 6 answers · asked by Anonymous

a club with 20 women and 17 men needs to form a committee of size six. How many committees are possible if the committee must have three women and three men?

2007-07-19 09:08:10 · 3 answers · asked by Anonymous

Yep, i'm back again.

As pathetic as it may sound I am unable to factorise this equation. This mean put it into 2 bracets as in (x+1)(x-5).

Please help.

2007-07-19 09:05:42 · 10 answers · asked by Anonymous

your help is appreciated. thank you

2007-07-19 08:58:04 · 3 answers · asked by Anonymous

if the answer is 1/2e^2x + x ; could u explain why it is not e^2x + x instead of the previous since the integral of e^2x is e^2x not 1/2e^2x.

2007-07-19 08:57:29 · 3 answers · asked by Anonymous

2007-07-19 08:56:12 · 4 answers · asked by Anonymous

please help me solve this. please explain. thank you very much for your help.

2007-07-19 08:42:47 · 2 answers · asked by Anonymous

d^2y/dx^2+dy/dx+ax/b=0

2007-07-19 08:41:17 · 4 answers · asked by ( -_- ) 1

2007-07-19 08:32:43 · 9 answers · asked by charles w 1

1.- If you are going to measure something, what determines the unit of measure that you will use?


2.- Describe a way in which you could determine approximately how many grains of rice there were in a pound of rice without conting them?


3.- What is the difference between square measure and cubic measure?


4.- What is the perimeter of a rectangular figure that is 6inch by 11 inch?


5.- Explain why the area of a parallelogram and the area of a rectangle with the same base and height will be the same.

Thanks for helping, please tell me which answer is for which question. Thanks again!

2007-07-19 08:13:27 · 4 answers · asked by Whale 1

Factor the polynomial completely. If the polynomial cannot be factored, write prime.
24k3m - 81m4

(6km - 9m2)(4k2 + 9m2)
3m(2k - 3m)(4k2 + 6km + 9m2)
3m(8k - 3m)(k2 + 6km + 9m2)
3m(2k + 3m2)(4k2 - 6km + 9km2)

2007-07-19 08:07:39 · 4 answers · asked by Anonymous

2007-07-19 08:01:04 · 4 answers · asked by Anonymous

Hi all, this probably sounds mad, but when I am working out the sum of n terms in a geometric series, when the common ratio is negative I am getting the answers wrong every time and cannot see where i am going wrong.

The book I have has proven the formula

Sn = [a(1-r^n)]/[1-r]

where Sn = sum of n terms
a = first term and r = common ratio

Now take the question when the first term = 5 and common ratio = -2 find the sum of 10 terms

s I put in

{S10} = 5(1 - (-2^10)) / 1 - - 2
= 5(1 - (-1024) / 3
= 5(1025) / 3
= 5125/3

Now the answer is wrong, because it should be -5115/3 which would then give the correct answer to me. The only place I can see how they get this is to have 5(1 - 1024) but I cannot see how this can be....please help its driving me mad!!!!

2007-07-19 07:55:37 · 5 answers · asked by John W 2