From memory, I got:
1. 3.706
2. 5 + 10i
3. 12° + n72° and 68° + n72°
4. a = 0.36, b = 4.8
5. It was a fairly obvious show that question
6a. 45° anticlockwise rotation
b. A reflection in the line y = tan(22.5)x
c. 90° anticlockwise rotation
d. Identity matrix, therefore no effect.
e. Reflection in the line y = x
7. 2 < x < 3, or x > 7/2
8. 5x^2 - 24x + 72
9. The points of intersection were (6, 2) and (6, -2)
That's just from memory though, might have gotten some of the question numbers wrong!