The answer would be $24.55 per oz of gold alloy so rounded up would be $25
        
                    
             
        
        
        
ok so she has a 50% chance of serving first so if she serves first she has a 55% percent chance of winning multiply .55 and .50 to get .275 now she also has a 50% chance of not serving first so multiply .47 and .50 to get .235 now that you have the two probabilities of her winning you add them together so .275+.235 = .51 so she has a <u>51%</u> chance of winning the game
        
             
        
        
        
Equation parallel to y = -x is y=-x+k
so 4.5 = -7 + k so k - 11.5
Equation is y = -x + 11.5
 
        
             
        
        
        
Isn't it 5?                           
I think it's 5 , I may be wrong idk.