<span>3x(x^2+4)
= 3x^3 + 12x
hope it helps</span>
        
             
        
        
        
I’m not to sure my my guess is zero because it is not going up or down
        
             
        
        
        
Answer:
C
Step-by-step explanation:
 
        
             
        
        
        
W=17 im too good at math to be wrong about this
        
                    
             
        
        
        
Answer:
7
Step-by-step explanation:
280=40t/40
t=7