[zed963]

(Original post by Berry14)
its really annoying because i worked it out wrong but i knew how to do it, i just wrote down the wrong sign.

2y+x=5 through the point (3,7)

2y+x=5 (divide by 2)
y+x/2 = 2.5 (-x/2)
y=-x/2 +2.5

m X m perpendicular = -1
-0.5 X m perpendicular = -1 (divide by -0.5)
m perpendicular = 2

y=2x+c
7=2X3+c
7=6+c (-6)
1=c

answer: y=2x+1

Where are you getting the m X m perpendicular = -1 from

[subjectman10]

gradient for a perpendicular line is m X m=-1

[Periodic Table]

(Original post by Dhibla.)
I got 560cm^2

I got that but I found out it is wrong, you might have done what I did which is forget the base because that was 100cm^2 which would have given you 660cm^2. Hope this helps

[Dhibla.]

(Original post by Periodic Table)
I got that but I found out it is wrong, you might have done what I did which is forget the base because that was 100cm^2 which would have given you 660cm^2. Hope this helps

Oh, thanks... That is what I done. Hmph. There goes my A*

[zed963]

(Original post by Periodic Table)
I got that but I found out it is wrong, you might have done what I did which is forget the base because that was 100cm^2 which would have given you 660cm^2. Hope this helps

Yes it is wrong its 660cm^2

[AkhiMohamed]

Everyone grade boundaries are as follows 52-A* 42-A 34-B 28-C as this paper was not as easy as march because of the last question perpendicular line question which was rearranged funnily and i believe that the grade boundaries will stay the same as both this paper and the march paper wore similar in difficulty.

[AkhiMohamed]

(Original post by Cell Sap)
I think I done really bad on this paper. Was the rationalize denominator answer 2 root 6?

well edexcel accept it unsimplified as 12root6 over 6 but they prefer your answer of 2root6 with nothing on the bottom but the question was to rationalise the denominator so the best thing to do is to leave it

[AkhiMohamed]

(Original post by Tarmu)
Factorise:
x^2+16

that is (x+4)(x-4) this simplify to x^2+4x-4x-16 this becomes x^2-16

[Berry14]

Does anyone have a mark scheme for it?!

[Mihawk Gallio]

(Original post by AkhiMohamed)
that is (x+4)(x-4) this simplify to x^2+4x-4x-16 this becomes x^2-16

Did you had to simplify it? I only wrote (x+4)(x-4)...

[dan18]

(Original post by Mihawk Gallio)
Did you had to simplify it? I only wrote (x+4)(x-4)...

(x+4)(x-4) was the answer

[subjectman10]

yes I'm sure it is- It only said FACTORISE not simplify.
I think...

[Mihawk Gallio]

(Original post by subjectman10)
yes I'm sure it is- It only said FACTORISE not simplify.
I think...

Phew, Thanks mate, so do I.


the 0.25 dot question was kinda easy


Here's explanantion =

10x2.5555555
- x 0.2555555
-----------
2.3
---- x 10 = 23/90
9


Did you had to write 23/90 'x' though?

[Mihawk Gallio]

(Original post by dan18)

(x+4)(x-4) was the answer

Saved me, How many marks was that question

[Mihawk Gallio]

for the unit question I accidentally

I did

515 x
0.35
answer-----
answer
00000000


And put 180,250, Will I still get marks If I accidentally put 0 on my answer and working?


I know I won't get full marks

[zed963]

(Original post by Mihawk Gallio)
for the unit question I accidentally

I did

515 x
0.35
answer-----
answer
00000000


And put 180,250, Will I still get marks If I accidentally put 0 on my answer and working?


I know I won't get full marks

You should for your working out. It was a 4 mark question if I remember clearly :P

[Berry14]

(Original post by zed963)
You should for your working out. It was a 4 mark question if I remember clearly :P

Yes why was there so many marks for that question?!

[subjectman10]

(Original post by Mihawk Gallio)
Phew, Thanks mate, so do I.


the 0.25 dot question was kinda easy


Here's explanantion =

10x2.5555555
- x 0.2555555
-----------
2.3
---- x 10 = 23/90
9


Did you had to write 23/90 'x' though?

no, just 23/90 was enough

[Berry14]

I really really want to know the grade boundaries! does anyone know them? Im dieing here -.-

[zed963]

(Original post by Berry14)
I really really want to know the grade boundaries! does anyone know them? Im dieing here -.-

For an A* its most likely around the 50 mark or 90%

You'll have to die until August the 23rd I guess