Mathematics: Post your doubts here!

[notnek01]

someone please do oct/nov 2013 42...qn 6 b (iii)....please explain how the answer is obtained and thnx in advance

The only possible letters that can appear exactly twice are 'E' and 'N'. Start with 'E':

There are 3 options for 'E' appearing exactly twice :

E, E, not E
E, not E, E
not E, E, E

And similar for 'N' :

N, N, not N
N, not N, N
not N, N, N

For example, P(E, E, not E) = (3/11) x (2/10) x (8/9)

Have a go at the others yourself then add them all up. Let me know if any part doesn't make sense.

 

[Kiara P.]

How can I find the scale factor done for a certain shape (Object) that had been enlarged to an (Image) over a graph?
I heard that you just take the area of both shapes and divide them over each other..
But if that was the answer then how can I calculate the area of the shapes on a graph when no numbers given for the shapes....

 

[AnonymousX9]

Guys, M/J 2010 P41 Question 7c(i), please explain how do we show that ECD = 120??

 

[Israa Adam]

a friend of mine did this , i hope you get it ..

 

[masterex567]

Good luck everyone!

 

[AnonymousX9]

a friend of mine did this , i hope you get it ..

How is it 60??? Pls help

 

[qwertypoiu]

How is it 60??? Pls help

angles in an equilateral triangle

 

[misscute406]

so how was the paper everyone??

 

[misscute406]

so how was the paper everyone??

 

[NOneed2speedd]

so how was the paper everyone??

Just ok..... i think 10-15 mark gone

 

[misscute406]

hey what was the radius r of the cone??

 

[misscute406]

don't worry i'll lose more marks than you!! :'(

 

[misscute406]

and the length l??

Just ok..... i think 10-15 mark gone

 

[NOneed2speedd]

hey what was the radius r of the cone??

4.5

 

[NOneed2speedd]

and the length l??

Its most probably wrong but around 54

 

[misscute406]

???? hey the hypotenuse was 12and the angle was 135....i used sine maan!! :'(

 

[NOneed2speedd]

???? hey the hypotenuse was 12and the angle was 135....i used sine maan!! :'(

Which question r u talking about

 

[misscute406]

bearing was?? B from A??

 

[misscute406]

Which question r u talking about

the third question!!

 

[misscute406]

Its most probably wrong but around 54

even i got something like that around 54!! hi5!!