Answer:
3=111
Step-by-step explanation:
 
        
                    
             
        
        
        
(a) 

 = 400
(b) 


(c) Only the positive solution makes sense because you cannot have a negative side length.
(d) Since one side of the painting is 20 inches, all four sides together will be 20*4 = 80 inches
 
        
        
        
Step-by-step explanation:
might be option c is a correct answer of your given question 
 
        
             
        
        
        
<span>I believe in this item, we are asked to determine how many 5's should be added together in order to form 100. This is calculated by dividing 100 by 5. The answer by completing the operation would be equal to 20. Hence, the answer is 20. </span>