Answer:
Step-by-step explanation:
B 
 
        
             
        
        
        
Answer:  None. The question asks about $4 per hour.
Step-by-step explanation:   The cost changes by $4 every 2 hours. 
That is $2 per hour.
 
        
             
        
        
        
Answer:
60 cents
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
acc to ques....perimeter of figure= 3a^2+15a+9
let missing dimension be x
= x+10a-2+a^2-7+5a=3a^2+15a+9
x+15a+a^2-9=3a^2+15a+9
x=2a^2+18
 
        
             
        
        
        
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