Wed Feb 28, 2007 5:35 pm
For part A, it's simply inserting the x values that you know (0 and 8) into that formula. Also for part B, could you just confirm which bit is divided by 4 - all of it, or just the last bit?
EDIT: I'll assume it's just the last bit so:
1) Multiply the (x-8)² out to get (x² - 16x + 64) and also turn the 25 into a fraction with 4 as the denominator.
2) You'll be left with 100/4 - (x² - 16x + 64)/4, which you can squish into one big fraction, leaving you with (-x² + 16x + 36)/4
3) Factorising that will finally leave you with: ((18 - x) (x + 2)) / 4
EDIT: I'll assume it's just the last bit so:
1) Multiply the (x-8)² out to get (x² - 16x + 64) and also turn the 25 into a fraction with 4 as the denominator.
2) You'll be left with 100/4 - (x² - 16x + 64)/4, which you can squish into one big fraction, leaving you with (-x² + 16x + 36)/4
3) Factorising that will finally leave you with: ((18 - x) (x + 2)) / 4
Thu Mar 01, 2007 10:50 pm
Yep it was the last bit. No point in putting brackets there though because of bodmas :p
Thanks again ^^
Thu Mar 01, 2007 10:55 pm
guineadan wrote::) Yep it was the last bit. No point in putting brackets there though because of bodmas :p
Thanks again ^^
I'm just a brackety kinda guy
Doesn't hurt to put them in, and not everybody uses bodmas all the time, so it's a lot more convenient 
Fri Mar 02, 2007 12:20 am
Anoohilator wrote:guineadan wrote::) Yep it was the last bit. No point in putting brackets there though because of bodmas :p
Thanks again ^^
I'm just a brackety kinda guy
I feel obliged to make a post defending pemdas
... And, uh, ask what the o stands for.
Fri Mar 02, 2007 7:33 am
pipsqueeek wrote:Anoohilator wrote:guineadan wrote::) Yep it was the last bit. No point in putting brackets there though because of bodmas :p
Thanks again ^^
I'm just a brackety kinda guy
I feel obliged to make a post defending pemdas
... And, uh, ask what the o stands for.
"of", indices basically but bidmas sounds silly
Tue Mar 06, 2007 10:08 pm
I need to make a cork able to stay stationary in water...any ideas?
Wed Mar 07, 2007 11:47 am
KAMiNix2 wrote:I need to make a cork able to stay stationary in water...any ideas?
Try sticking a big metal kebab skewer from it, and put the end of the skewer in plasticine, to weight it down and stick it to the bottom.
I used this in my physics coursework a couple of years ago, and I stuck a rotary pot on the cork. The cork will still float on the top level of the water, but remain on the skewer.
If you want it to remain stationary up and down as well, just put more plasticine there.
Wed Mar 07, 2007 11:53 am
If you put a cork in glass of water, it will move to the side, no matter how you put it. However. If you fill the glass to the brim, to the point where the water-level is actually in a convex (rather than a concave form, which would happen in a 1/2 glass of water.) form. Then you put the cork in, and given that you haven't actually overfilled the glass (this requires practice), the cork will stay in the centre of the glass.
Mon Mar 12, 2007 7:17 pm
I need to write an essay about soe guy called Schindler from Nazi germany, except google has decided to hate me today and I don't have any of my notes, so if anyone knows anything about him, help will be greatly appreciated!!
Wed Mar 14, 2007 11:05 pm
Watch Schindlers List. Now.
Seriously, that film is great, and really informative. And it's good to talk about it if you run out of notes
Thu Mar 15, 2007 8:47 pm
Ixist wrote:
Watch Schindlers List. Now.
Seriously, that film is great, and really informative. And it's good to talk about it if you run out of notes
We are watching it.
In history, our lessons involve watching it and taking notes.
V. good film. *nodds*
Fri Mar 16, 2007 9:36 pm
I'm writing a paper on the United Nations and if its relevant in insuring peace and security. The problem I'm having is actually coming up with an opening sentence or sentences for the essay. I have the information for points but I can't for the life of me start this essay with a general look on the topic.
Any thoughts?
Any thoughts?
Sat Mar 17, 2007 1:23 am
Ammer wrote:I'm writing a paper on the United Nations and if its relevant in insuring peace and security. The problem I'm having is actually coming up with an opening sentence or sentences for the essay. I have the information for points but I can't for the life of me start this essay with a general look on the topic.
Any thoughts?
Maybe talk a bit about how it was created after WWII to ensure peace, but without the constraintns of the League of Nations. Then say something like "However, does the United Nations live up to it's name? Is it actually fulfill it's original duty and ensure global peace?" Then you could go into your whole schpiel about whether it does or doesn't. It also makes it easy to answer the question at the end by saying "Yes, it does live up to it's purpose" or "no, it does not live up to it's purpose".