Add the equations to eliminate p. That leaves w open to solve. 
        
             
        
        
        
Answer:
Step-by-step explanation:
its A
 
        
                    
             
        
        
        
I believe this is multiple choice so choose the one that says something around not being in debt
 
        
                    
             
        
        
        
C = 2πr
c/2π = 2πr/2π <--divide both sides by 2π
c/2π = r
r = c/2π <-- answer :)
        
                    
             
        
        
        
First bring the 9 to the other side by subtracting it so you get the equation; x^2+10x-9=0 and you answer would be x=9 and x=1. you may have wrote the question own wrong? is the x^2 negative? if so i give my answer :)