Functions are relations that only have one output per input (or graphically passes the vertical line test). You can either go on Desmos and graph this or just look at my explanations below.
 
1) function, pretty much all polynomials will be a normal function
2) function. This is a rational function, meaning you'll have some weird gaps and lines going to infinity but it's still a function. It's formed by a polynomial divided by another polynomial.
3) function, looks like you can simplify this into a standard rational function.
4) relation, y with an even square root are never going to give you a single solution (due to the nature of a + or - answer;  = +3 and -3)
 = +3 and -3)
 
        
             
        
        
        
Answer:
X=30
The whole triangle = 180 degrees
 
        
                    
             
        
        
        
It takes him 1 hour to read 30 pages so he’ll be reading 15 pages in 30 minutes so 
17 pages in 34 minutes
        
             
        
        
        
Gestation percent of humans is 72.87% and lions is 29.58%. Subtract and humans 43.29% longer.
        
             
        
        
        
Answer:
 y = 3(x2 – 7) = 3x2 – 21
Step-by-step explanation: