[Maths HELP!] Factorising...

[wiithepeople]

yeah, i know how you feel, I think I'm an insomniac too.

Bleh, I'm supposed to be doing math now, too...
mathematical induction crap, I hate it cause you have to prove formulas and write like half a page per question.

Hehe... This saturday I wrote an exam test in 3-D Computer Graphics... 6 questions... i handed in 12 pages...

4 hours... it was not nice! not at all! (it was the same questions as a previous test but much much harder... AND less points per question

it sucked big time)

Yeah, I hate those kinds of essay math tests, especially when you write a ton and then find out that the "correct" answer is like a fifth of the writing you wrote, cause they use a method that is not better but much easier and faster.

lol run-on sentence ^^ I'm not good at grammar.

 

[leonheart_a]

Quick question i have a scientific calculator btw.
How do i work out a percentage of something (e.g 18% of £236) using my calculator?

Thanks

 

[wiithepeople]

0.18 * 236. Just convert fraction to decimal.

 

[leonheart_a]

I cant believe i didnt know that. I Hope i remember everything for the exam
Thanks Wiithepeople

 

[vivienne]

Ok, got another question, which am not sure about.

*) AT is a tangent at T to a circle, centre O.

OT = x cm, AT = (x+5) cm , OA = (x +8) cm.

a) show that x² - 6x -39 = 0

b) Solve the quation x² - 6x -39 = 0 to find the radius of the circle.

3 sig. fig. answer.

I did solve this type of questions in the class, but we had Rectangler shapes or Quadratical shapes. This is an exam style question. My process is right, but still not sure what I am suppose to do by the way...

By the way, this question belongs to chapter "Quadratic Equations"

(X+5)²+X²=(x+8)²

==> x² - 6x -39 = 0

It is a little hard to solve the quation, because it is not integer.

 

[Agjsdfd]

ALRITE!

The exam was quite easy!
Factorising and expanding questions took me less than 2 minutes. Total mark was 9 of factorising and expanding, and got all correct.

I didnt revise frequency polygon and frequency density stuff, as I was the only one who got it correct in the mock.. and now still I made mistake on frequency density question...
And had no time to finish a triangle question. Am good at it, thats why I left it to do at the end than had no time...

Anywayz, worse should be a B.

 

[moozxy]

Congrats.
I had a maths paper today aswell.
I raped it

 

[ShadowXP]

mine was pretty alright i thought, couldn't answer the A* question though (but we'd never done it in class).

 

[Agjsdfd]

Yah do you mean that last question with: "a" and "k"?

And we had to find the values?

All my mates just guesd, same as me. LOL.

 

[leonheart_a]

Im suprised the exam was actually not that bad. But im not going to say anything until i get the results

Now for english.....

 

[ShadowXP]

Yah do you mean that last question with: "a" and "k"?

And we had to find the values?

All my mates just guesd, same as me. LOL.

yeah, what the hell was that about

 

[Issac]

hmm, what was that question? Just curious!

 

[Agjsdfd]

As far as I know, that question involves the chapter "Transformations of function".
The examples in the book are quite easy.. but than they ask you something like that..

You need loads of practise to be able to do questions like that.
Anywayz its over so chill and concentrate on english exam tomorrow(if you have it tomorrow).

 

[moozxy]

Biology for me tomorrow...

 

[Agjsdfd]

Biology for me tomorrow...

Hehe good luck.
I had my biology, which everyone found pretty horrible. The marking scheme will go very down, so thinks everyone.

Have chemistry on thursday. Hardest thing is tritration and making salt. But I finished my revision quite long ago, so I will just practise a few titration calculation and electrolysis.

 

[moozxy]

I haaaaaaateeeeeeee chemistry.. I suck at it..

Goood luck everybody~

 

[Agjsdfd]

hmm, what was that question? Just curious!

All I know is that it involves "Transformations of function". There was quite a load of information in the question so cant really remember all the values.

but there was a question about quadratic equation. Got it right

. Plus had to prove that that those values in the form of fraction can be written in the form of: ax²+bx+c = 0.

Was quite straight forware as I had good practise with it yesterday.

 

[Calafas]

I found the maths today fairly easy, except the last question. :/ And I have English and History tomorra!

 

[Agjsdfd]

Hehe, you shudnt be worried about english! Quite simple.
But I shud.. as I fucked up the courseworks.. so have to get close to the maximum mark in the exam.
Anywayz.. dont really know what to revise for english. Just going through the dictionary to pick up interesting words.. lol.

 

[leonheart_a]

For english arent you guys doing poems?
Cause i have to