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## #1 Re: Introductions » hello from Ontario » 2013-02-15 09:52:04

Hi, Tony and Misha.

Welcome to the Math is Fun forums. Good to have you here. There is a lot of math-related information here and many knowledgeable members. I am sure you will find these forums an excellent resource for any math-related question.

See you around the forums.

## #2 Re: Introductions » A New Member Join In This Community » 2012-10-13 03:50:14

Hi, Matin.

Welcome to the Math is Fun forums. Good to have you here. There is a lot of math-related information here and many knowledgeable members. I am sure you will find these forums an excellent resource for any math-related question.

See you around the forums.

## #3 Re: Introductions » 36 y/o and in grade 12 math. » 2012-02-11 06:47:01

Hi, "mamabear".

Welcome to the Math is Fun forums. Good to have you here. There is a lot of math-related information here and many knowledgeable members. I am sure you will find these forums an excellent resource for any math-related question.

By the way: No, you do not sound like a loser. Life has many twists and turns; you are just doing things in a different order than other people.

See you around the forums.

## #4 Re: Help Me ! » Calculate the percentage » 2012-01-20 08:54:52

So the numbers under the "Amount" heading refer to costs?

Is there a pre-determined policy for allocating that \$3 that cannot be assigned to any of the companies?

At this point, I would just calculate the percentages using the numbers you have presented:

Company xxx: 10/30 = 1/3.
Apply this fraction to the (30 - 3 = 27): (1/3)(27) = \$9

Company yyy: 8/30 = 8/30.
Apply this fraction to the 27: (8/30)(27) = \$7.20

Company zzz: 9/30 = 3/10.
Apply this fraction to the 27: (3/10)(27) = \$8.1

Alternately, you would calculate the initial proportions as 10/27, 8/27, and 9/27. But unless we are told the desired method, I am just guessing.

When you add the cost percentages, are they supposed to add up to a certain amount?

## #5 This is Cool » Google's Graphing Capability » 2012-01-20 08:37:26

DavidB
Replies: 0

I didn't see this mentioned elsewhere in the forums, so thought I would mention it.
I think this is cool.

"Showing some love to math lovers"
insidesearch.blogspot.com/2011/12/showing-some-love-to-math-lovers.html

It also includes some sample curves, so users get an idea how to use this feature.

Enjoy.

## #6 Re: Introductions » Just wanna introduce myself! » 2012-01-20 08:13:44

Hi, Omar.

Welcome to the Math is Fun forums.
Maligayang pagdating.

We are glad you joined us. There is a lot of math-related information and many knowledgeable members here. I am sure you will find these forums an excellent resource for any math-related question.

See you around the forums.

## #7 Re: Introductions » Happy New Year! » 2012-01-20 08:09:03

Hi, Anna.

Welcome to the Math is Fun forums. Good to have you here. There is a lot of math-related information here and many knowledgeable members. I am sure you will find these forums an excellent resource for any math-related question.

See you around the forums.

## #8 Re: Introductions » Hi all... » 2011-05-04 15:08:55

Hi, Deon.

Welcome to the Math is Fun forums. Good to have you here. There is a lot of math-related information here and many knowledgeable members. I am sure you will find these forums an excellent resource for any math-related question.

See you around the forums.

## #9 Re: Maths Is Fun - Suggestions and Comments » Systems of Linear Equations » 2010-12-18 17:15:57

MathsIsFun wrote:

New page: Systems of Linear Equations

It turned out really long, but that seems inevitable. Waddya think?

I think it is very good. Thorough and explained in an easy-to-understand manner.

Although I did wonder why most of the page was typed and some was handwritten. To be consistent, I think it should have been all typed.

Other than that, I think it is a job well-done.

## #10 Re: Help Me ! » Excel Help » 2008-07-23 15:00:15

Just in case this question comes up in the future, the following link might be useful, on Microsoft's support site:

http://support.microsoft.com/kb/103839

Regards,

David

## #11 Maths Teaching Resources » Numerical Mathematical Utilities » 2006-09-12 04:16:53

DavidB
Replies: 1

Here is a site with several numerical mathematical utilities:

http://www.akiti.ca/Mathfxns.html

For example, it has utilities for solving the Quadratic, Cubic, and Quartic Equations; solving N Equations in N Unknowns; Eigenvalues and Eigenvectors; and more.

In addition to using the posted routines themselves, the references are good too, if anybody is interested in reading more. (And the NETLIB site, too, is a fantastic repository of information and source code.)

Regards,

David

## #12 Re: Maths Teaching Resources » Metric unit conversion resources » 2006-09-12 04:06:40

I have also found the online convertors at http://www.onlineconversion.com/ to be good.

I have been using Convert for several years and never had a problem with it or a conversion it could not do. It is small, doesn't need an install program, just sits there on my desktop for when I need it, I just close it down when I am finished. Clean and slick.

Regards,

David

## #13 Introductions » David Here » 2006-09-11 06:44:59

DavidB
Replies: 6

Hi, everybody.

Joined MathisFun on Friday and never received the password e-mail. Maybe  blocked it or something; I have joined a few other forums and had similar problems there too, and the Administrators of those forums indicated that myway.com is not liked by some forum software. Anyhow, I re-requested the e-mail and this time it worked. So I am here now.

I enjoy math and computer science; as a hobby, I have written several numerical linear algebra routines and posted many of them on my website. They are intended for upper-level high-school students or undergraduate university students, so I am not sure how appropriate they would be for these forums.

I presently live in Vancouver, British Columbia, Canada.

Well, I guess that is all for now. I'll try to make myself helpful around these forums where I can.

Regards,

David