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June 2009 Paper 3. 1)a) P(walk) = 37 100. 2) a)4x + 3y – 2x + 5y = 2x + 8y b) 2c + 4r Hint: make up values for c and r and work out what sum you would need to do. 3)a) y = 4x – 3 Your graph should be a straight line through all the points with no ‘corners’ - PowerPoint PPT Presentation
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June 2009Paper 3
1)a)
b)P(walk) = 37100
Walk Car Other Total
Boy 15 25 14 54
Girl 22 8 16 46
Total 37 33 30 100
2) a) 4x + 3y – 2x + 5y = 2x + 8y
b) 2c + 4r
Hint: make up values for c and r and work out what sum you would need to do
3)a) y = 4x – 3
b)Your graph should be a straight line through all the points with no
‘corners’
On this exam you only got 1 mark for plotting your points if they were wrong
x -2 -1 0 1 2 3y -11 -7 -3 1 5 9
4)a) P = 4k – 10 P = 50
50 = 4k – 10 (1 mark)60 = 4k k = 60 ÷ 4 k = 15 (1 mark)
b) y = 4n – 3d n=2 d=5
y = 4x2 – 3x5 (1 mark)y = 8 – 15y = -7 (1 mark)
5)a)
5)b)
Translation 3 right and 1 down 3 (1 mark) (1 mark) -1
6) a) Opposite sides of a rectangle are equal
b) 4x + 1 = 2x + 122x + 1 = 12 2x = 11
x = 5.5
c) Perimeter = 5.5 + 5.5 + 23 + 23 = 57cm
7) 322 x 48 = 15456
a) 3.22 x 4.8 = 15.456
b) 0.322 x 0.48 = 0.15456
c) 15456 ÷ 4.8 = 3220
8) a) 2x2 = 72 x2 = 36 x = 6
b)
72 = 2 x 2 x 2 x 3 x 3
= 23 x 32
72
36 2
6 6
2 3 2 3
9)
9)
10)There are 40 litres of water in a barrel.The water flows out of the barrel at a rate of 125 millilitres per second.1 litre = 1000 millilitres.Work out the time it takes for the barrel to empty completely.
40 litres = 40 000 millilitres40 000 ÷ 125 = 320 seconds
(40 000 ÷ 125 = 40 x 8)
11)a) 62.5
11)b) 63.5
12)
13) a) What type of magazines do you read?
Sport Music Fashion
One question 1 mark
Tick box options – at least two options 1 mark
13) b) How many magazines have you read in the last month?
0 1-2 3+
Time period e.g. month, week, year1 mark
Tick box options – at least three non-overlapping options 1 mark
14) 6.8 x 191 0.051
7 x 200 (1 mark for at least
0.05 two of these)
1400 (1 mark) 0.05
28000 (1 mark)
(Dividing by 0.05 is the same as multiplying by 20)
15)a) Write 64 000 in standard form
6.4 x 104
(b) Write 156 x 10-7 in standard form
1.56 x 10-5
16)a) Factorise fully 4x2 – 6xy
2x(2x – 3y)
b) Factorise x2 + 5x – 6
(x + 6)(x – 1)
17)
Use upperbounds
Join with a smoothcurve
17)b) Median is‘middle
one’
60th value
Mark given for any value
between 235 and 245
17)c) Men spent more money than women
18)a)
Work out the size of angle AOD54° (2 marks)
tangent is perpendicular to a radiusangles in a triangle add up to 180° (reasons not required)
18)b)
Work out the size of angle ABC. Give a reason for your answer.
27° (2 marks)
Angle at the centre is twice the angle at the circumference. (1 mark)
19)a)
x = 2, y = 3
19b) Find an equation of the straight line which is parallel to the
line y = ½x + 2 and passes through
the point (0, 4)
y = mx + c
y = ½x + c
y = ½x + 4
20)a) 3t + 1 < t + 12
2t + 1 < 12 2t < 11
t < 5.5
20)b) t is a whole number.Write down the largest value
of t that satisfies
3t + 1 < t + 12
t < 5.5
largest value of t is 5
21) M is directly proportional to L3.When L = 2, M = 160Find the value of M when L = 3
M = k x L3
160 = k x 23
160 = k x 8 160 = k 8
k = 20M = 20 x L3
M = 20 x 33
M = 20 x 27 = 540
22)
23)a)
0.2
0.2
0.2
0.2
0.30.5
0.50.3
0.50.3
23)b) Work out the probability that Vishi will win both games.
0.5 x 0.5 = 0.25
24)a) AB = AC (sides of an equilateral triangle)
AD = AD (common side)
ADC = ADB = 90°
Therefore ABD and ACD are congruent (RHS)
24)b) BD = DC (congruent triangles)
BC = AB (equilateral triangles)
Therefore BD = ½ AB
25) 1 + 1 = 1u v f
1 + 1 = 1 (1 mark)5/2 10/3 f 2 + 3 = 1 5 10 f 4 + 3 = 1 10 10 f
7 = 1 (1 mark) 10 f
f = 7 (1 mark)10
25) 1 + 1 = 1u v f
1 = 1 - 1u f v
1 = v - f u fv fv
1 = v - fu fv
u = fv v - f
26)
a) Find an equation of the translated curve.
y = f(x – 4)
26)
b) On the grid, sketch the graph of
y = 3 cos (2x°) for values of x from 0 to 540
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