The answers are (A) (C) and (E).
The reason why (A) is a possible answer is because each side length can be multiplied by 2 to get from 6 and 3- 12 and 6.
The reason why (C) could be an answer is because if you divide 6 and 3 by 2 you would get 3 and 1.5.
The reason why (E) could be a possible answer is because if you divide 6 and 3 by 3 you would get 2 and 1.
The other answers cannot be multiplied or divided by anything to get the answers that the others have so the others are not proportional.
Answer:
well I am sorry about that inconvenience but I can not help you if you do not put your questions
Answer: x=4
Step-by-step explanation: 5x-2x-2=10
3x-2=10
Add 2 to both sides
3x=12
divide both sides by 3
x=4