Answer:  43,2 
 
Step-by-step explanation:

 
        
             
        
        
        
Answer:
y=40
Step-by-step explanation:
 
        
                    
             
        
        
        
Polynomial requirements
1. never divide by a placeholder
2. variable exponent has to be a whole number 
3. can't have infinte terms
by 1. we eliinate 2nd one
by 2. we eliminate first one (√x=x^1/2) and 3rd one because it has an exponent in placeholder
thie leaves us with last one
f(x)=2x³-5x⁵-(2/9)x²+9
last one is answer