186cm
You add all the sides up, so 42+42+51+51 which equals 186cm
        
             
        
        
        
I think not because a square has four sides and a triangle has three.
        
             
        
        
        
Erik will pay $18.75 for the cashews.
        
             
        
        
        
First you can add 26 on both sides so you gonna have : 4x - 3x = 16 - 20 + 26 
so you can say : x = -4 + 26 so x= 22 :)))
i hope this be helpful 
have a nice day 
        
                    
             
        
        
        
-d would equal 3. just flip its around right?