AS ocr MEI MATHS C1 13 TH JAN 2012

Yeah, can someone put the unofficial answers please! ALL of them, not individuals

for the $\sqrt54+(\frac{12}{\sqrt6})$ question I put $3\sqrt6+2\sqrt6=5\sqrt6$

Some answers i got cant remember exact questions but sort of in order:
y=-x/5+31/5
1/3 and 32x^10y^-3
6n^2+12n+8
root2+23
3root6 + 12/root6 --- didnt simplify this fully
-14/3<x
9a-5/(4+a^2)
5(x+1.5)^2+0.75...0.75
area of triangle =10
midpoint =(3/2,9/2)
x co-ordinates for one of the questions on section b where 9/2,3??
and y crosses at +12 for a question?

for the $\sqrt54+(\frac{12}{\sqrt6})$ question I put $3\sqrt6+2\sqrt6=5\sqrt6$

How are you doing the root symbols and stuff?

Got all of this, but i don't remember one where the x co-ordinates were 9/2,3.
For the implies question i got i) Both imply each other ii) right implies left
.. and i got 5(x+1.5)^2+ 1.75 i think? Can't remember properly.
.. and i thought the root question was 2+root23? not root2 +23, but I could be wrong.
for the simplification i got along the lines of 3root6+2root6=5root6, (because i got 12/root6 to be 12root6/6.)
(2x-1)(x-4)(x+3) &lt; for the fully factorised function of x? or roughly that anyway.
Centre of circle (2,0) with radius root20, y co-ordinates (0,-4) and (0,4) (+-root16)
Triangle area 10units^2
y=-1/5x + 6.2 i think, it was 31/something but i put a decimal(first question)
for the last question i got something like k=-1 and k=0 but i really didn't have much of an idea of how to do that so that's probably where i've dropped some marks.
Still thinking of other answers, if anybody could jog my memory it would be appreciated

I also put +4, but my teacher was saying that it was something like 0.9 :/ :/

I got 67, a C. I found out my aunt died on the bus on my way to the exam though so I wasn't really concentrating, and I also have anxiety so it definitely didn't help. I need an A for my uni place as well! Good luck with C3 and I hope we both get into our first choices! Have you done the C3 coursework? What did you get? Hopefully that will push up your overall C3 grade

I'm now depressed because I got the wrong answers for the complete the square question (I put down 5(x+15/10)^2+9.75 whereas it should've been 5(x+1.5)^2+0.75) and the area of the triangle which is 10, but I put down 20. I hope I get marks for the calculations. Damn, I can't believe I made such silly mistakes....and this was my 2nd attempt at C1 after getting a C last year. FUUUUUUUU-

Can someone explain to me how they did question 10 by using the pythagoras theorem? I proved that the sides were perpendicular by using m1xm2=-1 and i got 9 square units for the area of the triangle... How did everyone get 10 :P