It is 0.2 x 0.4
The green part is 20 squares and the yellow part is 40 squares. The intersection has 8 squares which means the answer is 0.08
        
             
        
        
        
Not sure the question but the only one that makes since is Line 1....
3*x^2 =6x^2
3*2x=6x
and the -7 its just in a different form
        
                    
             
        
        
        
60 square feet = 8640 square inchs
 So, 60 square feet = 60 × 144 = 8640 square inchs.