Answer:
20.758
Step-by-step explanation:
 8.74 + 7.086 + 4.932
 
        
             
        
        
        
My English is not that great but if I got it right the answer is 3
 
        
             
        
        
        
The correct answer of 1/3 is the decimal form of it which is 0.3 repeated (you can put a line on top of the 3). If not just leave it as 1/3 it is simplified as a fraction.
        
             
        
        
        
Answer:
AB is parallel to BE because it is an equilateral triangle. 
BE is parallel to EC because it has 2 of the same angles to the same sides are equal.
Hope that helps, it's a tad hard to explain