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# Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 2 Answers June 2012

1. Mr M’s Edexcel GCSE Mathematics A Higher Linear Paper 2 Answers June 2012

1. Parallel lines

133 degrees

Angles on a straight line sum to 180 degrees

Corresponding (or alternate) angles are equal (3 marks)

2. Calculator

a) 43.736 (2 marks)

b) 40 (1 mark)

3. Questionnaire

a) Any two of: overlapping time periods; no option for more than 4 hours; no option for 2-3 hours; doesn’t say time period (2 marks)

b) Improved question with non-overlapping boxes and a time period specified (2 marks)

4. Linear graph

Correct graph drawn (3 marks)

5. Garden

5 boxes - full working needed (5 marks)

6. Potatoes

Farm shop - full working needed (4 marks)

7. Scatter graph

a) Negative (1 mark)

b) 11 km (2 marks)

8. Transformations

a) Correct rotation (right angle at (4, -1)) (2 marks)

b) Correct enlargement (right angle at (7, 2)) (3 marks)

9. Holiday money

51 (3 marks)

10. Inequalities

a) -1, 0, 1, 2, 3 (2 marks)

b) (2 marks)

11. Trial and improvement

4.6 (4 marks)

12. Biased dice

120 (2 marks)

13. Mean from frequency table

28.25 minutes (4 marks)

14. Algebra

a) (2 marks)

b) (3 marks)

c) (1 mark)

d) (2 marks)

15. Water meter

Yes he should get the meter - full working needed (5 marks)

16. Trigonometry

48.2 degrees (3 marks)

17. Compound interest

£6676.72 (3 marks)

18. Pythagoras’ Theorem and trigonometry

16.5 cm (5 marks)

19. Standard form

(3 marks)

20. Changing the subject

(3 marks)

21. Proof

Show expression simplifies to 24n so it is a multiple of 8 (3 marks)

22. Quadratic formula

x = 1.72 or x = -0.387 (3 marks)

23. Sampling

a) (i) Any student has an equal chance of being selected

(ii) Putting names in a hat and drawing them out (or other valid method) (2 marks)

b) 21 (2 marks)

24. Area of triangle

29.3 (5 marks)

25. Biscuits

(4 marks)

26. Vectors

a) b - a (1 mark)

b) 0.75b + 0.25a (3 marks)
2. FIRST!
3. Yes!!!!!! Waited till midnight for that moment
4. (Original post by syd.mclean)
FIRST!
I think you will find I was first.
5. Haha, waited a long time to see this mark scheme!
6. For question 14 d). is it okay if I wrote 3x^4y√y ?
7. (Original post by ZeqiG)
For question 14 d). is it okay if I wrote 3x^4y√y ?
yes
8. (Original post by Mr M)
I think you will find I was first.
Awfully sorry
9. thank you i think i got between 78-82 depending on how harsh the marking is and if ive included the correct workings
Non calculator= 55
Calculator=80
135/200, what do you think this will be?
thanks mr m, such a nice paper!
10. Would putting (a+3b)/4 (as a fraction) be ok for question 26b?
11. can we see the questions aswell i want to remember what question i did to get that specific answer some of them i cant remember
12. Thank you so much, I did really well!
13. (Original post by ColourblindKid)
Would putting (a+3b)/4 (as a fraction) be ok for question 26b?
yes
14. I thought u had to wait 24 hours
15. For question 10B will i get a mark for putting X=3.25?
16. I'm off to bed now folks but I will answer questions in the morning so you can post them here and I will try to work through them when I get up.
17. (Original post by Mr M)
yes
Thank you!

I think I got 97/100, completely messed up question 21
18. would you mind explaining very briefly how you actually get the answer to 25? I think i spend about 20 minutes alone on that question haha (and got it wrong of course!)
19. (Original post by king0617)
For question 10B will i get a mark for putting X=3.25?
yes
20. Ok thanks a bunch!

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