Answer:
f(x)  = 4x² + 9x - 28
Step-by-step explanation:
Create the polynomial by multiplying (4x - 7) and (x + 4) together:
f(x) = 4x² + 16x - 7x - 28, or
f(x)  = 4x² + 9x - 28
Next time, please share the given answer choices.  Thanks.
 
        
             
        
        
        
I believe you get 10 dollars in interest.
        
                    
             
        
        
        
Answer:
its a combination problem, so in your calculator put 9 nCr 4 and you'll get 126. i hope this helps. :)
Step-by-step explanation: