1 is corresponding 
2 is alternate interior
3 is alternate interior
4 is alternate exterior
5 is adjacent 
Hope this helps.
        
             
        
        
        
Answer:
12.3
Step-by-step explanation:
 
        
             
        
        
        
Answer:
See Explanation
Step-by-step explanation:
The question is incomplete, as there are no options to select from.
However, a general explanation is as follows.
Given

Required
Is  a correct expression?
 a correct expression?
Let


So:

becomes


Divide both sides by 2

Hence:
 is incorrect
 is incorrect
 
        
             
        
        
        
Answer: (+) 1/3
Step-by-step explanation: 2/3 + -1/3 is basically subtracting 1/3 from 2/3 so, 2/3 - 1/3 = 1/3.