Answer:
The first and third is correct.
Step-by-step explanation:
I'm not a expert but I know its right.
1. 12a+6=12a+6
2. 12a+6=12a+2
3. 12a+6=4a+6
4. 12a+6=7a+5
Answer:
false
Step-by-step explanation:
I don't know you have to use a measuring tool to figure it out ruler helps sorry try a ruler of a angle scale