Mathematics: Post your doubts here!

[Zeerik]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w07_qp_2.pdf

Qs 7,12,18,19

 

[MERIHAN]

which variant???

21 ...its just written ....correct region shaded

 

[bluefa1con]

--------------------------
which year?????????????

every marks scheme shows the answer for the question

 

[nolife4now]

It's little tricky. You have to split the constant:

x^2 + 4x - 8
x^2 + 4x + 4 - 12
(x^2 + 4x + 4) -12

Now factorize the part in the brackets:

(x+2)(x+2) - 12

This can also be written as:

(x+2)^2 - 12

So, p = 2
and q = -12

thx Abrar

 

[always-smile :)]

21 ...its just written ....correct region shaded

so how can we be sure of it then ?

 

[always-smile :)]

every marks scheme shows the answer for the question

give us a year to check it then we can't find it in the m.s of june 2011 :s

 

[Zeerik]

http://www.xtremepapers.com/papers/CIE/Cambridge%20IGCSE/Mathematics%20(0580)/0580_w07_qp_2.pdf

7,12,18,19

 

[MERIHAN]

every marks scheme shows the answer for the question

but in june 11 there is no answer

 

[GetSomeLife]

thx Abrar

No problem no life Wese nam kia tha tumhara?

 

[anooshraja]

http://www.mathsisfun.com/geometry/pyramids.html
Maybe it'll help
All d best

thanks

 

[bluefa1con]

june 11 mark scheme nothing is writtem

try older ones

 

[anooshraja]

MAY JUNE 2011 23 QUESTION 19 AND 12 PLZ

 

[anooshraja]

MAY JUNE 2011 23 QUESTION 19 AND 12 PLZ

 

[always-smile :)]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w07_qp_2.pdf

7,12,18,19

--------------------------------------
7-multiply the first equation by -3 then work normaly
12- a- no intersection in this area so it will be ø
b-try to draw it : firt shade A then shade A' you will find that you shaded the whole graph so it will be ξ
c- try the same methode you will find that the area shaded twice is A so it will be A
18-a - the gradiant = y2-y1/x2-x1 ---> 0-8/10-0= -0.8
b- y=mx+c m= -0.8 c=8 so --> y= -0.8x+8
c- parallel lines have same gradiant so make a table with substitution c will be = 3.4

 

[Zeerik]

Any One! Predictions on the Exam!?

I Think it'll be Easier cuz i did M/j 2011 Paper 22 It was Easier then older once!

 

[InternationationalGuy]

A company makes solid chocolate eggs and their shapes are mathematically similar.
The diagram shows eggs of height 2 cm and 6 cm.
The mass of the small egg is 4 g.
Calculate the mass of the large egg.

I need help with this question. Is there some kind of formula for an eggshape or something?? Please help me and explain to me step by step.

 

[always-smile :)]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w07_qp_2.pdf

7,12,18,19

i'm sorry but can't solve no. 19 cos i don't have the test printed so can't solve it
hope i helped

 

[aliiiiiiiiii]

Hello there okay so i was doing o/n 22 number 12 and i got 200 by doing this( 0.5*10*40) but when i looked at the mark scheme it says its 80 can somebody explain it to me howw

which year??

 

[always-smile :)]

A company makes solid chocolate eggs and their shapes are mathematically similar.
The diagram shows eggs of height 2 cm and 6 cm.
The mass of the small egg is 4 g.
Calculate the mass of the large egg.

I need help with this question. Is there some kind of formula for an eggshape or something?? Please help me and explain to me step by step.

IT doesn't need any formula just make cross multiply with the similarity rule --->4x6/2=12 g

 

[anooshraja]

A company makes solid chocolate eggs and their shapes are mathematically similar.
The diagram shows eggs of height 2 cm and 6 cm.
The mass of the small egg is 4 g.
Calculate the mass of the large egg.

I need help with this question. Is there some kind of formula for an eggshape or something?? Please help me and explain to me step by step.

which year