Answer:
4/5 is the slope of the line
 
        
             
        
        
        
The average speed is the ratio between the distance covered, and the time elapsed to cover that distance. 
The total distance is the sum of the three distances covered:

Similarly, the total time elapsed is

So, althought you didn't always travelled with the same speed, you globally covered 170km in 1.75 hours. This leads to an average speed of

 
        
             
        
        
        
your answer would be  (2,3) 
 
        
             
        
        
        
Answer:
61.66
Step-by-step explanation:
1. Multiply
2. divide
 
        
                    
             
        
        
        
Puppies : Adults = 1 : 4
Total parts = 1 + 4 = 5
 
5 parts = 100 dogs
1 part = 100 ÷ 5 = 20 dogs
Answer: 20 puppies