Am I correct on these two​

9. Correct 12. Incorrect, it's D

Step-by-step explanation:

9. There is a 1:2 ratio of blue to red paint to create the shade of purple, so 6:12 would follow the 1:2 ratio so it's correct.

12. 6:14 can be simplified to 3:7 ratio. 8:16 doesn't follow 3:7 (it follows 1:2) so it can't be the right answer. 12:28 follows the ratio so it's right.

yes

Step-by-step explanation:

because you don't need me to give you the correct answer and besides if you pay attention you would of been confident now your welcome :)

0 < x <3

Step-by-step explanation:

3 < x+3 < 6

Subtract 3 from all sides

3-3 < x+3-3 < 6-3

0 < x <3