Maths, Addmaths and Statistics: Post your doubts here!

[exploded diper]

No, no never. They just ask you to find the solution by any method.

thts gud...

 

[exploded diper]

4:21

And

1:4


AM I RIGHT, NOW? *Sigh*

i guess its 4 ratio 25......

 

[era30amy]

funky brat

Q-8 d)
First you have to make this equation --> 12/x = 2x like the first one. For that, you have to add -x on both sides. V
12/x - x = 2x - x

Now you see one is a reciprocal graph and the other one is a linear graph. Draw this and tell me if it's right. =S

 

[Dream.Eater]

View attachment 44047

Are my answers right?

Yep,they are.Thanks!

 

[exploded diper]

Yep,they are.Thanks!

y is ur signature so tired.......

 

[Dream.Eater]

What is an identity matrix?/quote]
Suppose you have a matrix A which is 2x2. You get the inverse A^-1. The product of A inverse and A is I where I is the identity matrix (1 0
0 1)

 

[Dream.Eater]

[Suppose you have a matrix A which is 2x2. You get the inverse A^-1. The product of A inverse and A is I where I is the identity matrix (1 0
0 1)quote="Dream.Eater, post: 812463, member: 95901"][/quote]

 

[princess Anu]

If we are given the matrix that will map object onto image how do we find the matrix that will map image back into object ? (transformation)

 

[asadalam]

in quadratic equations like x^2 + 30x + 64800 = 0
i try to find the factors by multiplying random numbers ..... do we have to show how we got the answer.. ( not by using the x wali equation ) .... is theere method to show how to gain the factors in this case ..240 and -270 ...or is it okay if we dont show how we gained them ..

You can get my method given by FLRNAB but there is also another one.If you have the fx-991 ES PLUS(Silver wala calculator )put the equation in it by chosing mode 5 equation and chosing equation number 3.Put in a b and c to get x and then from those factors you can decide what numbers to multiply.

 

[funky brat]

Q:Ada is x years old and Bill is y years old.
Last year, Bill was 6 times as old as Ada.

Form an equation in x and y and show that it simplifies to y = 6x– 5

ANS. 6x-1 = y-1
This becomes y = 6x. Where did the +5 come from? :/

I solved this question too but it's kinda mystery for me.
But I think because bill is 6 times as old so 6 and last year so -1= 5.

 

[exploded diper]

You can get my method given by FLRNAB but there is also another one.If you have the fx-991 ES PLUS(Silver wala calculator )put the equation in it by chosing mode 5 equation and chosing equation number 3.Put in a b and c to get x and then from those factors you can decide what numbers to multiply.

yeh i know tht...but vat i was asking was ht does the examiner require the working for it....which is no real working btw.....but still i got my snswer...so yeah thx.....

 

[exploded diper]

Q:Ada is x years old and Bill is y years old.
Last year, Bill was 6 times as old as Ada.

Form an equation in x and y and show that it simplifies to y = 6x– 5

ANS. 6x-1 = y-1
This becomes y = 6x. Where did the +5 come from? :/

last year ada was x -1 and bill was y-1
so 6(x - 1) = y - 1
6x -6 = y - 1
6x -6 +1 = y
6x -5 = y
tadaa

 

[Asad.Babur]

mainay to bhai answer nikal dia tha
possible or not is another thing

Admit it, it waas DHOKA

 

[era30amy]

last year ada was x -1 and bill was y-1
so 6(x - 1) = y - 1
6x -6 = y - 1
6x -6 +1 = y
6x -5 = y
tadaa

 

[era30amy]

AbbbbY, you are needed here. :'3
d)

 

[exploded diper]

AbbbbY, you are needed here. :'3
d) iii)

are my eyes deceiving me or there is no d 111

 

[Mahnoorfatima]

Question 11 i bii. Finding PT. It's simple but Idk how am I supposed to solve it. Anyone?
http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_w08_qp_2.pdf

 

[exploded diper]

Question 11 i bii. Finding PT. It's simple but Idk how am I supposed to solve it. Anyone?
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_w08_qp_2.pdf

scale factor is ditance of the image from the cetre of enlargement / distance of the object from centre of enlargement
so take the distance of the Image from E to be " d " .... and hence the distance of the of the Object from E is d -9 ( 10 - 1 = 9 )
scale factor =4
4= d/ d-9
4 (d - 9) = d
4d -36 = d
4d - d = 36
3d = 36
d =12
so the distance of the image from E is 12 ..... u subtract 12 from 10 = -2
so e ( -2 , 3 )

 

[Asad.Babur]

so there was something wrong with the accuracy of the diagram right?

Yup, the Top of Trapezium was 8 and below was 18, however, it was such badly drawn that it still became Tangent from all sides of a CIRCLE raduis 12

 

[funky brat]

AbbbbY, you are needed here. :'3
d) iii)

Is main diii konsa hai?