1. True
2. True
3. False
4. False
5. True
6. False
7. B, 8 units
(3x -4 = x+12, solve the equation)
8. D, 40 degrees
(3x -4 +x+12, substitute the value of x found in question 7)
9. B
10. C
11. A
12. D
13. A, 7 units
(3y + 1 = 2y + 8 , solve the equation)
14. A, 22 units
(3y+1, substitute the value of y found in question 13)
15. C, 10 units
(CL is half of CO)
If you have any more questions, feel free to ask me ;)