Here
we can see that the problem gives us the length of a sandwich of x =
1.2. The problem also asks us for the expression that better
represents the approximate length of the crust given among the
options above. Here we simply have to substitute x to each of the
choices.
The
answer is B) x = 8x² + 34; 45.52 centemiters
I
hope it helps, Regards.
 
        
                    
             
        
        
        
        
Yes because if you divide both, the numerator and denominator, by 7 it would simplify  to 10/3, so they are equivalent.
        
             
        
        
        
1. 15*15= 225
2. 8*8= 64
3. 225+64= 289
4 . 17*17=289
        
             
        
        
        
the starting point of the function is 0