Answer:
8x + 4 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
10 inches
Step-by-step explanation:
Assuming a rectangular tile
P = 2(l+w) where l is the length and w is the width
P = 2(1+4)
    = 2(5)
    = 10 inches
 
        
             
        
        
        
Let the speed of the joker initially be x mi/hr
after reduction, the new speed will be: (x-1) mi/hr
but
time=(distance)/(speed)
hence :
Total time taken will be:
4/x+5/(x+1)=41/20
solving for x we get:
x=21.585 mi/hr
thus the initial speed was 21.585 mi/hr after reduction the new speed was 20.585 mi/hr
        
             
        
        
        
C is the answer to your question 
 
        
                    
             
        
        
        
Answer:
Step-by-step explanation: