Answer:
-81
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
it is 27 
Step-by-step explanation:
it is asking for absolute value of 27 which means how far is that number from 0. so it would be 27. 
 
        
                    
             
        
        
        
Answer:
B
Step-by-step explanation:
In order for something to be a function, they must not have repeating x-values. Looking at the answer choices provided, B is the only answer that does not have repeating x-values. 
 
        
                    
             
        
        
        
Answer:
Approximately 6.4
Step-by-step explanation:
We can use the pythagorean thereom here, that tells us (a^2)+(b^2)=c^2. C is the hypotenuse, the side opposite from the right angle, while a and b are the other sides. We can insert 5 and 4 as a and b, and solve for c
:(5^2)+(4^2)=c^2
:25+16=c^2
:41=c^2
:sqrt(41)=6.4=c              (We square rooted both sides. 6.4 is only rounded to the nearest hundredths place.) Hope this helps!