Mathematics: Post your doubts here!

[KyleoAhsan]

P and Q are positive quantities, P is inversely proportional to Q² . when P = 160 Q = 20. Find the value of P when P = Q​

 

[Iridescent]

P and Q are positive quantities, P is inversely proportional to Q² . when P = 160 Q = 20. Find the value of P when P = Q​

P is inversely pripotional to q^2
P=k/Q^2 , where k is the constant
160=k/20^2
160=k/400
k=160*400
k=64000

when P=Q,the equation is,
P=k/P^2
P=64000/P^2
P*P^2=64000
P^3=64000
taking the cube root of 64000,
P=40

 

[KyleoAhsan]

Thanks ! It was already solved in my post in IGCSE section! But thanks your answer is correct !

 

[Teach-me!]

can any1 tell me abt sequences and any imp. topics in which students tend to loose their marks in paper 2 maths!

ASAP pls

 

[KyleoAhsan]

Sequence is nothing that people should worry about...you need to have a good understanding of Algebra and sometimes learning common patterns are also helpful as well as learning about square and cube numbers will help a lot too..! That's pretty much about Sequences ! The more you do sequence numbers the familiar you are with the type of questions....My tip is do sequence question from around 1993 to the latest available! and also google for more sequence questions! Important thing here is understanding how the question is and how to answer it rather than getting from marking schemes!

 

[Teach-me!]

P and Q are positive quantities, P is inversely proportional to Q² . when P = 160 Q = 20. Find the value of P when P = Q​

well u just need to know that when its inversely proportional u hav to divide and vice - versa

well can u type in some q's fr me or gimme the link as tmrw is my prelim and i dnt hav tym pls
help appreciated!

 

[Hardil]

Book-Ric Pimentel
Chapter 17- Vectors
Extended section- Student Assessment 3
Pg 288 Q3bi), Q3bii)
Pls reply!!! Tks in advance!!!!

 

[Hardil]

ANYONE DID SCIENCE COMBINED 0654 here??????????????????????

yess

 

[Hardil]

ANYONE DID SCIENCE COMBINED 0654 here??????????????????????

 

[Hardil]

yesss

 

[Teach-me!]

Book-Ric Pimentel
Chapter 17- Vectors
Extended section- Student Assessment 3
Pg 288 Q3bi), Q3bii)
Pls reply!!! Tks in advance!!!!

do they hav the online version of the book cos i dnt hav that book
or
type here the question

 

[boredome]

is 185/200 in 0580 o level an A or an A*?

 

[Panuwat]

Assalamoalaikum!!

Stuck somewhere in Maths?? Post your queries here! If you have any doubt in the pastpper questions, then kindly post the link to the paper!

P.S. I'm busy these days, so I can't promise to be there for help.

May Allah give us all success in this world as well as the HereAfter...Aameen!!

SEQUENCES-Points to remember:
Many people find it hard, but to be honest it's just more of logic..that's all!

O/N 2009 P.4

Q.2(iv)..How is it possible to get a negative shear factor in this case? Please help

 

[Toomuch1995]

I have a major problem while solving pastpapers...
I want notes that explain me the following:-
1)Shear and stretch
2)Histograms
3)locus
4)probability

 

[french410]

I have a major problem while solving pastpapers...
I want notes that explain me the following:-
1)Shear and stretch
2)Histograms
3)locus
4)probability

http://www.cs.colorado.edu/~mcbryan/5229.03/mail/55.htm
http://www.mathsisfun.com/data/histograms.html
hope it helps!!

 

[Toomuch1995]

I have a Question in maths
From the past papers may/june 2003
question 18 (a) only where it asks to find the scale of the drawing in form of 1:n (n is an integer)
and the question after it number 19

 

[Saahil Parikh]

i can't remember the matrix in transformations
can anyone help?

 

[Toomuch1995]

i can't remember the matrix in transformations
can anyone help?

I also have problem in this any help from members would be appreciated

 

[darklashbazinga]

Re: IGCSE Maths Tips nov.2010!Confused!have questions?Post h

yes Vai as MasterOfPuppets said...all shapes have a rotational symmetry of one...thanks for answering MasterOfPuppets!
btw...hope u r now clear with rotational symmetry..let me know if u need more!

hi i am giving my exam in oct/nov 2012 , could u plzzzz tell me wich range of pst papers shuld i solve????????? please asap

 

[XPFMember]

hi i am giving my exam in oct/nov 2012 , could u plzzzz tell me wich range of pst papers shuld i solve????????? please asap

Try going backwards starting with the latest paper available, do all the variants.