Since the chance of getting an even number on every roll is 3/6 or 1/2
We have to multiply 1/2 by 138 
The answer is 69. 
Hope this is correct, and pls correct me if I'm wrong :)
        
             
        
        
        
all you have to do is add up all the sides and your answer will be 21 cm
 
        
             
        
        
        
Answer:
The first one would be the heaviest
Step-by-step explanation:
becuase if you compare all three of them vertically you wil see that the tenth in the first one is larger than the other two
 
        
                    
             
        
        
        
Here is for solving for x