Answer:
x= -4.44
Step-by-step explanation:
 
        
             
        
        
        
Answer:
X = 2
Step-by-step explanation:
 
        
             
        
        
        
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I hope this helps you 
y=x^2-81
x^2=y+81
x=square root of y+81
f^-1 (x)= square root of x+81
        
                    
             
        
        
        
Answer:
A. 33x + 92y
Step-by-step explanation:
Set up the problem like this and combine like terms:
     40x + 58y
    - 7x  + 34y
--------------------
     33x + 92y
Or, set up the problem like this and combine like terms:
(40x + 58y) + (-7x + 34y)
40x + 58y - 7x + 34y
40x - 7x + 58y + 34y
33x + 92y
You should get the same answer with either method.