the answer is -2 because 21-23 is a negative number
 
        
             
        
        
        
Step-by-step explanation:
try doing a2+b2=c2 it will help
 
        
             
        
        
        
Answer:
x = 3 + 2 sqrt3 Or 3 - 2 sqrt 3
Step-by-step explanation:
 
        
             
        
        
        
The answer should be 78. 57%
        
                    
             
        
        
        
Graph it on the Ti-84 and use the trace function to find the intersection.
The answer is 
(-3,3)