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

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)

x < 3.25

(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)

p^2+5p-36

(2 marks)

b)

w=-2

(3 marks)

c)

(x+7)(x-7)

(1 mark)

d)

3x^4y^{\frac{3}{2}}

(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

4.9 \times 10^{-5}

(3 marks)

20. Changing the subject

t=\frac{2d-7}{6}

(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

\frac{111}{190}

(4 marks)

26. Vectors

a) b - a (1 mark)

b) 0.75b + 0.25a (3 marks)

(edited 11 years ago)

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FIRST!

Yes!!!!!! Waited till midnight for that moment

Reply 3

Mr M

Study Forum Helper

Original post by syd.mclean

FIRST!

I think you will find I was first.

Reply 4

king0617

Haha, waited a long time to see this mark scheme!

Reply 5

ZeqiG

For question 14 d). is it okay if I wrote 3x^4y√y ?

Reply 6

Mr M

Study Forum Helper

Original post by ZeqiG

For question 14 d). is it okay if I wrote 3x^4y√y ?

yes

Reply 7

syd.mclean

Original post by Mr M

I think you will find I was first.

Awfully sorry

Reply 8

Maisie10

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!

Reply 9

ColourblindKid

Would putting (a+3b)/4 (as a fraction) be ok for question 26b?

Reply 10

mohamedksmaar

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

Reply 11

ryanskey176

Thank you so much, I did really well! :smile:

Reply 12

Mr M

Study Forum Helper

Original post by ColourblindKid

Would putting (a+3b)/4 (as a fraction) be ok for question 26b?

yes

Reply 13

jammymonkey

I thought u had to wait 24 hours

Reply 14

king0617

For question 10B will i get a mark for putting X=3.25?

Reply 15

Mr M

Study Forum Helper

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.

Reply 16

ZeqiG

Original post by Mr M

yes

Thank you!

I think I got 97/100, completely messed up question 21

Reply 17

Maisie10

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!)