數學試卷答案 – St. Stephen’s Girls’ College Form 2 Math Final Exam 2018-19 Paper 2

數學試卷答案 – St. Stephen’s Girls’ College Form 2 Math Final Exam 2018-19 Paper 2

試卷答案

1. a) 4
   b) 2
2. 36.5 °C
3. 16/a
4. \(2a^{3}-a^{2}-14a+15\)
5. (5a – b)(15a – 3b + 1)
6. A = 3
7. a) No
   b) Yes
   c) Yes
8. a) \(b=\dfrac{a-1}{2c}\)
   b) \(c=\dfrac{bx}{4a-b}\)
9. x = 7/4
   y = -1/4
10. -3
11. x + y = 72 ….. (1)
    x – 8 = y ……. (2)
    (or reasonable answers)
12. a) 8.2 h
    b) 8.45h – 8.95h
    c) 0.5 h
    d) 9.5h – 9.9h  (or the fourth class interval)
13. 24
14. 48 mins
15. 1 : 20
16. 8 : 1
17. 9 cm
18. 48
19. 2 km
20. 1 : 0.025  (or 1 : 1/40)
21. 3
22. 60°
23. 72°
24. 36°
25. x = 48°
    y = 84°
26. 9 cm²
27. 4.36 cm
28. 12.0 cm
29. D
30. a) \(3\sqrt{a}\)
    b) \(5\sqrt{14}\)
31. 58.0°
32. 6.16 cm
33. 4/5  or 0.8
34. 33.0
35. 8.38 cm
36. cos θ
37. 12.5°
38. \(\dfrac{1+\sqrt{2}}{2}\)
39. a) Yes
    b) Yes
    c) No

St. Stephen’s Girls’ College Form 2 Math Final Exam 2018-19 Paper 2 試卷