Hoi!
The basic metric unit of capacity is a liter. :)
        
                    
             
        
        
        
2r=R
Because 2 of "r" make 1 R
        
                    
             
        
        
        
It will take JJ 4 hours to mow all of the yards in his block alone 
 
        
             
        
        
        
The answers 9. I took the test :)
 
        
             
        
        
        
Answer:
CD = 45
Step-by-step explanation:
CE = 180
( x + 6 ) + ( 4x - 21 ) = 180
5x - 15 = 180
5x = 195
x = 39
substitute x in CD 
CD = x + 6
CD = 39 + 6
CD = 45