Answer:
The probability that a coin flip is a head or a tail is 0.5. The probability that a coin flip is either a head or a tail is 1. The probability that a three-coin-flip is two heads and a head or a tail is 0.25.
Step-by-step explanation:
 
        
             
        
        
        
Y = x + 2
It starts out at (0,2) which means it needs to be up 2 from the parent graph (y = x). Then using the slope equation, the slope is 1
        
             
        
        
        
Answer:
25/2 I believe
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
-4 ± 2√6
Step-by-step explanation:
Rewritten in standard quadratic form, x^2+8x-2=18 becomes x^2 + 8x - 20 = 0.
Here the quadratic coefficients are a = 1, b = 8 and c = -20 and so the discriminant is b^2 - 4ac, or 8^2 - 4(1)(-20), or 96. 
Because the discriminant is positive, we know that this quadratic has two different real roots.  These roots are:
 
       -b ± √(b² - 4ac)
x = -------------------------
                  2a
which in this case comes out to:
        -8 ± √96          -8 ± 4√6          
x = ------------------ = ------------------- = -4 ± 2√6
              2                        2