Answer:
380
Step-by-step explanation:
171:45=3,8
3,8*100=380
 
        
             
        
        
        
Answer: 0.3125 hours 
Step-by-step explanation:
The formula for time taken to cover a distance is:
= Distance / Speed
Distance = 2.5 miles 
Speed = 8 miles per  hour
Time taken = 2.5 / 8
= 0.3125 hours 
In minutes this is:
= 0.3125 * 60 mins
= 19 mins approx
 
        
             
        
        
        

At the respective max and min values
 
        
             
        
        
        
1.) X=-2
2.) 2x-y+4=0
Hope this helps! :))