Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#126 Re: Introductions » About Me » 2007-04-01 22:23:20

That was one long welcome post.
                                                                                         
And hey, Choco. Devant\\\e pretty much covered everything, I think! big_smile

#127 Re: Guestbook » New Topic » 2007-04-01 22:20:33

Devant\\\e wrote:

Saturnese

ha                                                                                                       
ha
ha
big_smile

#128 Re: Jokes » Blondes don't do news. » 2007-04-01 22:16:30

Now I'm confused!
                                                                                                           
big_smile

#129 Re: Jokes » Blondes don't do news. » 2007-04-01 22:13:33

ZACH

Hey, Devant\\\e, this makes no sense now! Put it back! big_smile

#130 Re: Dark Discussions at Cafe Infinity » Global Warming- It's Happening! » 2007-04-01 22:11:13

Wow, and written back in 1996! To think nothing drastic (at least in my knowledge) has been done since then to stop the effects of global warming ...

#131 Re: Guestbook » Go Crazy » 2007-04-01 22:08:11

Choco wrote:

go ahead

Who said? big_smile

Thanks for the idea, Choco, but I don't think we really need another thread like this! Enough off-topic crazy posts already!

Do you mind if I close this thread?

#132 Re: Guestbook » I love this website » 2007-04-01 22:04:30

Choco wrote:

That's more than 14 people!

Haha, I counted and isn't it 13?
                                                                               

Devant\\\e wrote:

'Kirsty' is one,

Kirsten is to Kirsty as Kristen is to Kristy.

#133 Re: Help Me ! » LaTeX - A Crash Course » 2007-04-01 17:16:58

I think this thread is probably better in Help Me than here. To move or not to move, that is the question?

And also, should this be a clean thread or should we keep the discussion too?

#134 Re: Guestbook » I love this website » 2007-04-01 17:14:55

I've heard the name 'Krista' at least twice. It's not that uncommon.

And people I know whose names begin with the letter 'k':

Kate, Katie, Kirsten, Kristen, Kevin, Katherine, Karl, Kerry, Kelly, Kieran, Krista, Kirily, Karen ...

#135 Re: Guestbook » lol » 2007-04-01 17:10:05

Yes it does. If I'm thinking about what you're thinking about bringing back memories.
                                                                                       
big_smile

#136 Re: Help Me ! » LaTeX - A Crash Course » 2007-03-31 12:00:26

I suppose the logic is that when people first join, they see this thread.

Where do you think it should go? Help Me?

#137 Re: Help Me ! » Dividing Fractions » 2007-03-31 11:55:35

Welcome to the forum, !mathfun and lostmathmom.

I'm moving this to the Help Me forum ... hopefully you'll still be able to find it. I'll leave a redirect.

Thanks guys, and have fun on the forum.

#138 Re: Dark Discussions at Cafe Infinity » Haikus » 2007-03-30 19:32:51

No my name is not                                                                             
John, as you thought earlier,                                                 
But John's name is John.

#139 Re: Guestbook » hiu im michel » 2007-03-29 23:51:29

Woot woot OMG like michael jackson ROFL ROFL!!!!!!!!!!!!

#140 Dark Discussions at Cafe Infinity » Earth Hour » 2007-03-29 23:48:35

Received a message about this event in an email, and thought it was an interesting idea ...

At 7.30pm on 31 March 2007, we are inviting Sydneysiders - businesses and individuals - to turn off their lights for just one hour, Earth Hour, as a sign of their commitment to reduce global warming.

Earth Hour is just the start of a campaign that aims to reduce Sydney's greenhouse emissions by 5% in 2007. The event will demonstrate how simple actions can make the world of difference if everyone takes part. And it sends a powerful message that we care about the future of the planet.

This year's Earth Hour will happen in Sydney, but we hope that Earth Hour can grow into a global campaign. If you live outside of Sydney, you can show your support by joining us and turning off your lights at 7.30pm local time.

Anyone going to do it and sign up? It doesn't just have to be for Sydneysiders ... big_smile

ad-468X90.jpg

http://earthhour.smh.com.au/

#142 Re: Maths Is Fun - Suggestions and Comments » I might make a trading game » 2007-03-29 23:37:55

Well, I'm justlookingforthemom.
                                                                         
big_smile

#143 Re: Guestbook » Math » 2007-03-28 20:51:26

Good job, Erin. Thanks so much!

#145 Re: Guestbook » hiu im michel » 2007-03-28 20:42:32

Hi Michael Jackson, it's so cool you could join us here on the forum!

How have you been?

Love your stuff ... !

P.S. Your use of BBcode tags amazes me.

#146 Re: Dark Discussions at Cafe Infinity » Haikus » 2007-03-28 20:35:50

Devante wrote:

Not right, the last line has 6 syllables, unless you forgot to slip a 'he' in to the sentence before you posted it.

But ... isn't it 5-7-5?

John, those are good!

#148 Re: Maths Is Fun - Suggestions and Comments » Significant Digits java-thingy » 2007-03-27 21:33:54

It's a bit old, but no one has replied ...

It does that for me too, John. Also for 20, 22, and 26 decimal places with pi.

#149 Re: Help Me ! » Matrix help me........... » 2007-03-27 20:06:22

This problem is similar to the one you posted earlier about capsules and drugs. It can be solved in the same way as mathsyperson showed.

Here are your three simultaneous equations:

50a + 75b +  40c = 305 [1]
30a + 45b + 25c = 185 [2]
32a + 50b + 30 = 206 [3]

You could simplify if you wanted:
[1] simplifies 10a + 15b + 8c = 61
[2] simplifies 6a + 9b + 5c = 37
[3] simplifies 16a + 25b + 15c = 103

(where a, b and c are the respective airbuses.)

Combine equations and eliminate the variable 'c':

3*[2] - [3] --> 2a + 2b = 8 [4]
5*[1] - 8*[2] --> 2a + 3b = 9 [5]

So, like before, we now have two equations.

[5] - [4] --> b = 1

If you substitute b into either equation [4] or [5], you will be able to find a. Then, using the results for a and b, substitute them into equation [1], [2] or [3] to find c.

So, the airline company should fly three 'A' airbuses, one 'B' airbus, and two 'c' airbuses.

#150 Re: Guestbook » if you are a guest you might want too come in here! » 2007-03-27 19:33:04

Devante wrote:

EDIT: OK, I lied about myself being 1000 years old. I'm actually 3.14 years old.

Uh ... on other planet?

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