UNOFFICIAL MARKSCHEME Edexcel Maths Calculator paper 09/06/2016

I got 80.4 but don think it's right

it is 9.25

Some one help me please!!! I expanded (x+1)(x-1) to get x^2-1 would this still be right for Q25??


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Expanding those brackets out precisely gives u : -9x-12+3x^2+4x which cancels out to what u got except for it ending up resulting in a negative 5x as it would cancel out to get 3x^2-5x-12

Wasn't the last question like 1/2 * 7 * 8 Sin(X) = 18


56Sin(x) = 36

Sin^-1(36/56) = X

x = 40

???

I think I did it wrong then.

It was definitely £42.28

-9x-12 +3x^2 +4
3x^2 -9x -8

So you are wrong

I did the same

Hi I'm going to start and unofficial markscheme so add your answers
Reps are not necessary but would be appreciated

It would be really useful if you could remember the question numbers
1. Order numbers correctly and include a key
b) 0.45
2a. 30abc
b. 3(y+2)
c. x^2-3x
3. x=9.25
4. Smallest packet was best value for money because it was cheapest per bag of crisps
5. Green- 0.09 Red- 0.36
6a. 20.3
b. 68.04kg
c. 2.61m
7. 3.8
8a. 4:3
b. 480 pixels
9.x= 124 degrees
10. 7.92
11.£42.29
12. x=144 degrees
13.
-2 -1 0 1 2
-1 3 1 -1 3
Draw curve
14. 3 Bars
15. No, because 7766.22 was greater than 7500 pounds
16. 128g
b.11g
17. 30.1
18. 10a^5b^4
b. y= 5p^2-x
19.11 males
20. x= 0.29 or x= -2.29
21. 29.25
22. F.d- 1.6, 3.2, 2.4, 1.8, 0.3
23. -1/3x+4
24. 2x/(x+1)(x-1)
25. 80.4

I got 80.1? You're probably right. Did you get the other angle as 40 and side as 5.22?

I'm so confused. How can stratefied sample be 11 males as the answer was 10 point something students but you can't have a part of a student so I rounded down to 10?!!