Mathematics: Post your doubts here!

[strangerss]

Can some one please explain how to find n in Maj/June 2010 42 variant question 3d ??

 

[weirdoatlarge77]

URGENT HELP WITH QUESTION Cii) !

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_qp_42.pdf

 

[roudina]

okay use the formula prt/100= amount extra received after simple interest
you knw Marcus got 415 for his C.I
400*r*2/100= 415-400
800*r=15*100
r=5.125
got it

yes thank U

 

[roudina]

may june 2012 43 question 9 b ??
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_43.pdf

 

[Ramzaa]

How to find the height of the histogram without drawing it?
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20%280580%29/0580_w12_qp_41.pdf
Q 1) d)ii
Please help..

 

[Ramzaa]

How to find the height of the histogram without drawing it?
http://papers.xtremepapers.com/CIE/Cambridge%20IGCSE/Mathematics%20%280580%29/0580_w12_qp_41.pdf
Q 1) d)ii
Please help..

GUYS PLEASE HELP!

 

[Utathya]

Could you please tell me how to use the Graphic Display Calculator to find the line of regression.





x - 55 29 40 45 65 80 60
y - 30 46 35 27 20 15 25

 

[Utathya]

GUYS PLEASE HELP![/quote.

alright..... so you first find out the ratio between the value shown on the table and the length of the histogram... it would be 5.... notice that 14/5 gets you 2.8

therefore, for the first one you do 5/5, then 29/5 and then you will get your answers

hope this helps

 

[silentkiller97]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s10_qp_41.pdf question 8 d (iii) how do we find the inverse of a function on our graph?

instead taking the value 1.7 as y value in inverse we will take 1.7 as x value>

 

[silentkiller97]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_41.pdf
GUYS Q 6 PART b??? can someone explain PLZZZ y do we minus from 180??

we first calculate the angle using sine rule.
the answer comes in acute angle (ie: 90>x>0)
we using the formula sin(Q)=sin(180-Q0
get the obtuse angle of the same sine value

 

[silentkiller97]

URGENT HELP WITH QUESTION 10Cii) !

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_qp_42.pdf

-33+x =y
x+y =z
y+z =18
use the above equations by substitution one equation into other
like
z=18-y
so x+y = 18 - y ------equ..1
x-y = 33 -------- equ...2

 

[Pakistani_Kuri]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_43.pdf
11 b

 

[alamgir]

may june 2012 43 question 9 b ??
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_43.pdf

1-2*(1/x)
1-(2/x)
(1/1)-(2/x) make the denominators same. then you will get an equation like (x-2)/x nd its done. hope this does it.

 

[omaaaar]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_ms_42.pdf
Question 8(b)

 

[alamgir]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_qp_43.pdf
11 b

Lets see first ill just write the vectors
LO+OV
-(3/4)U + V + (1/3)U -(1/3)V
simplify it by adding the vectors you will get (-5/12)U + (2/3)V
it a bit confusing but hope so it helps.

 

[alamgir]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w10_ms_42.pdf
Question 8(b)

Its 16 because they gave the length scale factor which is 4 and to get the area scale factor just square it 4^2 is 16 thats the area scale factor and to get any volume scale factor just cube the answer for the length scale factor

 

[Rania1]

This is part A) I asked B) , thanks anyways

Oh sorry, this is b) i) similar ii) since they are both similar, the scale factor of length squared = scale factor of area . So, x = 49 x 20 / 100 = 9.8 iii) Area = 0.5 x base x height. You have the area and base, if you solve for height you will get 4. Sorry again

 

[Bloodserpent]

u know that paper 12 is a C paper right?

what is a C paper? xD

 

[Pakistani_Kuri]

Lets see first ill just write the vectors
LO+OV
-(3/4)U + V + (1/3)U -(1/3)V
simplify it by adding the vectors you will get (-5/12)U + (2/3)V
it a bit confusing but hope so it helps.

Thank You!! it really did helped.

 

[shazmina]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w12_qp_43.pdf can sum1 tl me hw to solve 7 (c) quickly plzzzz...