IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: yasser37 on May 12, 2009, 11:36:17 am

Title: PP2 Math question
Post by: yasser37 on May 12, 2009, 11:36:17 am
Hey all


I am doing the pp

I faced one hard q till now

its

O/N 06 Q 21 B

Title: Re: PP2 Math question
Post by: astarmathsandphysics on May 12, 2009, 12:02:52 pm
If you want me to answer can you post the question but not the paper as i am on a mobile phone
Title: Re: PP2 Math question
Post by: yasser37 on May 12, 2009, 01:28:16 pm
There is a drawing

I can't post
Title: Re: PP2 Math question
Post by: yasser37 on May 12, 2009, 02:12:16 pm
any1?
Title: Re: PP2 Math question
Post by: theigstudent on May 12, 2009, 02:39:21 pm
even i m stuck on same ques
some one plzzzzz help
Title: Re: PP2 Math question
Post by: astarmathsandphysics on May 12, 2009, 02:51:26 pm
Half hour
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 03:13:53 pm
Q21
Its about finding the equation of  a straight line which is always y=mx+c
First find the gradient
Using 1,-2 and 4,3
y2-y1/ x2-x1
m= 3-(-2)/4-1
m =3+2/3
m=5/3

Then, substitue m=5/3 in the equation y=mx+c

y=mx+c (using 1,-2)
-2 = 5/3 X 1 + c
-2 = 5/3 + c
c = 11/3

Then, substitute m and c in y = mx+c
so the equation of the line is y=5/3x + 11/3

(By the way i hope this is the question you were after:P)
Title: Re: PP2 Math question
Post by: yasser37 on May 12, 2009, 03:45:03 pm
One more quetion please

it's

June 02 Page 6 Q 12

and thanks angell   for answering
Title: Re: PP2 Math question
Post by: yasser37 on May 12, 2009, 06:03:56 pm
It is actually question 13
Title: Re: PP2 Math question
Post by: zubair_slipknot on May 12, 2009, 07:16:36 pm
hi i am having a problem in maths may june paper 2 2007

q. 12 pg.11

part (b)

South Wesern Bank advertises savings with compund intrest at 4.9% per year. Kalid brother invests his money in this baml.At the end of 3 years, how much more money will he have than Kalid?

its urgent actually as i do not have much time for my next exam of maths...thx
Title: Re: PP2 Math question
Post by: anshasi on May 12, 2009, 07:47:30 pm
THIS IS THE ANSWER FOR JUN 2006 q13
CROSS  MULTIPLICATION U GET 3(X-2)=4(2X+5)
3X-6=8X+20
3X=8X+26
-5X=26
-X=5.2
X=-5.2
 ;D
Title: Re: PP2 Math question
Post by: anshasi on May 12, 2009, 08:01:57 pm
ZUBAIR_M U MEAN QUESTION 22 )b)
A)2000*3*(5/100)=300
300+2000=2300

B)2000(1+(4.9/100))^3                                  ^ IS TO THE POWER OF
2000(1.049)^3
=2368.6
2368.6-2300=8.6
 ;)
Title: Re: PP2 Math question
Post by: theigstudent on May 12, 2009, 08:05:36 pm
Quote from: zubair_m on May 12, 2009, 07:16:36 pm
hi i am having a problem in maths may june paper 2 2007

q. 12 pg.11

part (b)

South Wesern Bank advertises savings with compund intrest at 4.9% per year. Kalid brother invests his money in this baml.At the end of 3 years, how much more money will he have than Kalid?

its urgent actually as i do not have much time for my next exam of maths...thx


use compound interest formula

A= P(1+R/100)n

 = 2000(1+4.9/100)3
 =2308.64
             2308.64-2300= 8.64
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 08:50:05 pm
huh im suckin at math so much rite now....nyways guys could someone tell me how to solve Q.5, Q.7  Oct/Nov 2008 P2...

IN Q.7 could somebody tell me the bounds im supposed to take?? im taking 6.15 and 8.15 but not gettin the answer according to the mark scheme??
Title: Re: PP2 Math question
Post by: anshasi on May 12, 2009, 09:28:44 pm
ACTUALLY I MADE A TYPING MISTAKENUMBER IS 2308.6 NOT 2368.6 :(
ZUBAIR_M U MEAN QUESTION 22 )b)
A)2000*3*(5/100)=300
300+2000=2300

B)2000(1+(4.9/100))3                                  
2000(1.049)3
=2308.6
2308.6-2300=8.6
Title: Re: PP2 Math question
Post by: pisecs on May 12, 2009, 09:31:54 pm
Quote from: angell on May 12, 2009, 08:50:05 pm
huh im suckin at math so much rite now....nyways guys could someone tell me how to solve Q.5, Q.7  Oct/Nov 2008 P2...

IN Q.7 could somebody tell me the bounds im supposed to take?? im taking 6.15 and 8.15 but not gettin the answer according to the mark scheme??

Q.5
just imagine that you are rotating the square from the point B 90*clockwise and where will you get D?
D will be on the same line with B
so wot you have to do it take the length of DC
and with a compass, from point B, draw a quater of a circle until the point where you get D after you rotate it

Q7.
yes, the upper bounds are 6.15 and 8.15
you just multiply them
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 09:40:50 pm
thank u loads....

now o/n 2008again... q.9b and 14b
Title: Re: PP2 Math question
Post by: angelic on May 12, 2009, 10:00:05 pm
hii guyz  :)
can some1 plz help me ..
i dont kno how to solve Q 10 from M/J/08 pg 4
Title: Re: PP2 Math question
Post by: pisecs on May 12, 2009, 10:08:06 pm
here i've solved your questions
save the pics to see them in full size

(http://i285.photobucket.com/albums/ll69/bbspisecs/9b.jpg)

(http://i285.photobucket.com/albums/ll69/bbspisecs/14b.jpg)
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 10:14:04 pm
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 10:15:54 pm
thanks piscecs:)

what about MY question:(
Title: Re: PP2 Math question
Post by: angell on May 12, 2009, 10:22:24 pm
ok now i see the answer..um sorrrrry but i wanted to know part b? how do we find the co-ordinates?
Title: Re: PP2 Math question
Post by: angelic on May 12, 2009, 10:34:43 pm
Quote from: angell on May 12, 2009, 10:14:04 pm
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

how did u find 1385.4  ??? .. i used the cylinder formula to find the volume of the glass and i got 197.9 ..
Title: Re: PP2 Math question
Post by: pisecs on May 12, 2009, 10:40:32 pm
Quote from: angell on May 12, 2009, 10:14:04 pm
find the volume of the glass using the cylinder formula

it will be 1385.4

divide it by 216.u get 6.4...

take 6 as a scale factor
and multiply
3X6=18 radius

7X6=42 height/..

thats what i did:S dunno if it is right tho!!!

yes thats correct, i've explained on a pic
(http://i285.photobucket.com/albums/ll69/bbspisecs/10.jpg)

i've solved part b too, it's under a)
so from a), we got y=2x-4
and in b) we know that y=0
so we find x
i underlined the answer in pink
Title: Re: PP2 Math question
Post by: angelic on May 12, 2009, 10:50:58 pm
everything is clear now .. thank u so much!!! :D ...
i cant believe that the exam is tomorrow .. im really worried!  :-[
Title: Re: PP2 Math question
Post by: pisecs on May 12, 2009, 10:58:16 pm
Quote from: angelic on May 12, 2009, 10:50:58 pm
everything is clear now .. thank u so much!!! :D ...
i cant believe that the exam is tomorrow .. im really worried!  :-[

no probz~ and yep the exam's 2morrow! dont worry, you'll do fine
the may/june exams are usually easier than the oct/nov ones
and if you've done enough past papers then you'll totally be fine!
maths is easy~ i'm more worried about the chem exam the day after

well~ GOOD LUCK EVERYONE!!