5.15 for the first hour after subtracting 12.20(7.15)
        
             
        
        
        
The correct answers is 0.66 or .66
        
                    
             
        
        
        
To find the zeros of this function, we must first set the entire function equal to 0
f(x) = x² - 2x - 15 = 0
Since this is a quadratic function, we must use the quadratic formula, which is:

Let's assign a, b, and c using our first function
x² means a = 1 (because it could be written as 1x²)
-2x means b = -2
-15 means c = -15
Now let's plug those in:

which simplifies to:

Simplified further:


And divide it by the 2 on the bottom gives us:

2+4 = 6
2-4 = -2
So the zeros of this function are 
-2 and 
6
 
        
        
        
Is there any choices if not it could be 1 - 2 or abouve the first nuber x has to be smaller and y has to be bigger
        
             
        
        
        
The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.
hope this helps :)