1 (a) 8 degrees (b) 2 degrees
2 (a) £4 (b) 3.7%
3 10, 0, 0, 0, 30 ; 9, 1, 0, 0, 29 ; 9, 0, 0, 1, 27 ; 8, 2, 0, 0, 28 ; 8, 1, 1, 0, 27 ; 7, 3, 0, 0, 27
4 (a) £108 (b) 11 / 20
5 (a) £45 (b) GREECE £43.50
6 y < 3 (altered question: 24 not -4 otherwise y < -1)
7 (a) 3p.m. (b) Yes; 5.30p.m.
8 Diagram
9 (a) 56 miles (b) £30.80 (c) £2394.40 (d) graph (extend line but at a lesser positive gradient)
10 (a) 3x + 3 = 42 (b) 16 years old
11 (a) 34.6 cm (b) 346 cm2
12 (a) 20cm (b) 8.4cm
13 3(5w + 2s t )
14 (a) 27 ; 1394
15 (a) m = 1 (b) draw line y = 2x -4
16 (a) 51,3m (b) 52m
17b (a) 11, 15, 39 (b) g = 4s -1 (c) 419.2m
18 44 teeth
19 x = 33.7 yes since x > 32
20 (a) y = (x - 1)(x - 4)(x - 7) (b) y = (x +2)(x - 2)(x - 4)