Answer:
21..........
Step-by-step explanation:
 
        
             
        
        
        
Answer:
8
Step-by-step explanation:

 
        
             
        
        
        
Are a and b two points on a line
If they are you can use the distance formula
        
             
        
        
        
Answer:
32m²
Step-by-step explanation:
thanks me later ,correct me if I'm wrong
 
        
             
        
        
        
Answer:7 mins
Step-by-step explanation:
47 minus 19 equals 28 4 times 7 equals 8