Edexcel GCSE Linear Higher Tier Non Calculator June 2010 Answers

93%

For the last question, I got the answer wrong, but do you get marks for working out?

By the way by your standards was this a hard paper?

Edexcel GCSE Linear Higher Tier Non Calculator June 2010 Answers

1. Collecting like terms
8x + 6y (2 marks)

2. Stem and leaf diagram
4 | 3 5 7 7
5 | 0 3 3 5 6 7 8 8 8
6 | 1 2 2
Key 4 | 3 = 43 eggs (3 marks)

3. Angles
(i) 40 degrees
(ii) Angles on a straight line sum to 180 degrees, it is an isosceles triangle, angles in a triangle sum to 180 degrees (4 marks)

4. Travel graph
(a) 1010 (1 mark)
(b) 13.3 km (you don’t need to be this accurate) (1 mark)
(c) Draw straight line down to meet time axis at 1150 (1 mark)

5. Rotation
Triangle with vertices at (1, -2) (-1, -2) and (1, -5) (2 marks)

6. Enlargement
Enlargement by scale factor 2 about (1, 0) (3 marks)

7. Sharing in a ratio
Anna £16 and Bill £24 (3 marks)

8. CD survey
(a) 15-19 (1 mark)
(b) Frequency polygon (2 marks)

9. Volume of triangular prism
120 (2 marks)

10. Multiplication
162.72 (3 marks)

11. People in the cinema
160 adults (4 marks)

12. Exterior angle of a regular pentagon
72 degrees (2 marks)

13. Improving a questionnaire
Overlapping boxes – a person who buys 5 DVDs could tick either of the first two boxes
No time period (2 marks)

14. Quadratic graph
(a) Missing y values 3, -3, -1 (2 marks)
(b) Graph of a parabola (U shape) (2 marks)
(c) x = 1.3 or x = -2.3 (1 mark)

15. Product of prime factors
2 x 2 x 3 x 3 x 5 (if you used indices this is fine) (3 marks)

16. Multiplying mixed fractions
$8 \frac{2}{3}$ (3 marks)

17. Algebra
(a) $3 (x + 4)$ (1 mark)
(b) $6 \frac{1}{3}$ (3 marks)
(c) $y^2 + 9y + 20$ (2 marks)
(d) $4x (2x + 3y)$ (2 marks)

18. Similar triangles
(a) 18 (2 marks)
(b) 10 (2 marks)

19. Depreciation of a car
£3240 (3 marks)

20. Dimensions
(a) Tick $a^2 (c + b)$ and $4abc$ (2 marks)
(b) 8000000 (2 marks)

21. Linear simultaneous equations
x = 4 and y = -2 (4 marks)

22. Cumulative frequency
(a) $20 < n \leq 30$ (1 mark)
(b) 16, 42, 65, 75, 80 (2 marks)
(c) Draw cumulative frequency graph (2 marks)
(d) Median = 29 (or an answer close to this)
IQR = 16 (or an answer close to this) (3 marks)

23. Equation of a straight line
(3 marks)

24. Indices
(i) 1
(ii) 8
(iii) $\frac{4}{9}$ (4 marks)

25. Quadratic involving Pythagoras&#8217; Theorem
(a) Show the quadratic equation (3 marks)
(b) x = 6 or x = -2
(c) 10 (4 marks)

26. Probability
$\frac{14}{45}$ (4 marks)

27. Circle theorems
There are many different correct ways to do this question
29 degrees (5 marks)

72/100 but one question i solved the quadratic equation but I did not understand what it meant by "show" and I accidental wrote 8 as the answer I didn't realise it said x + 4, also would I get marks for making a tree diagram for the probability part. And I didn't have time to do the last one and just wrong angles on a straight light = 180 when a tangent and radius meet 90 degrees would i got marks? And for the pentagon i did not realise it said exterior so i just found the interior 36 degree angels would I get any marks.

for the Stem and leaf the key was for the weight (grams) not amount of eggs

You won't get anything for the x + 4 part.

You will get some marks for a tree diagram if it was substantially right (you don't need a tree diagram by the way).

Tangent and radius perpendicular will be worth 1 mark.

Interior angles are 108 degrees not 36 degrees so I don't know if you will have got anything there.

there is one mistake in the answers given....a lot of the questions in this paper were in modular as well. square root of 64 isnt 8...its + or - 8; q24 ii.

Also I put 6.3333 recurring instead of 6 1/3 but its the same answer just in differen't form so would I still get the marks. Also I think I got around 88 marks.