Answer: 7
Step-by-step explanation: Cross multiply, so 15 times x and 21 times 5. 21 times 5 is 105 then you divide by 15 which gives you 7.
 
        
             
        
        
        
Answer:
does not terminate
Step-by-step explanation:
 
        
             
        
        
        
B. Total number of times the activity is performed: Number of times an event occurs
        
                    
             
        
        
        
Quadrilateras
A C
Parallel lines
A B