The sides of the frame are (12+2x) and (6+2x).
Its area A is 112.
Therefore by equating:
(12+2x)*(6+2x)=112
you can get the answer for x. You will obtain a quadratic equation you have to solve.
        
             
        
        
        
Answer:
I believe she did 4.5 miles each day
Step-by-step explanation: all I did was divide 52 by 12
Tell me if im wrong
 
        
             
        
        
        
I think it's along the y-axis.....