Answers for 7a:
1. 3
2. 2
3. 2
4. 1
5. 2
6. 3
7. 2
8. 2
9. 4
10. 1
11. 3
12. 2
13. 2
14. 1
15. 4
16. 428.15
17. 0.25 or 1/4
18. 5
19. 1/10
20. (3p + 12) or 3(p + 4)
21. 2.25 or 2 1/4
22. 45°
23. SE / South-East
24. 180
25. (3p - 4)
26.
3 units ® $8.40
4 units ® $ 11.20
$11.20 + $5 = $16.20 [M1], [A1]
27. 28
28. 100 – 81 = 19 [M1]
19/ 100 = 19% [A1]
29.
ÐDAB = 120° ÐYAB = 140°
ÐAYZ = 180° – 140° [M1]
= 40° [A1] or [A2]
30.
10% ® 8
210% ® 168 [M1], [A1]