Answer:
+5 is right and - 5 is left
Step-by-step explanation:
I. If 5 + (-5) = 0
   then 5 - 5 = 0
   If 5 is on the right side
    then -5 is on the left side
 
        
             
        
        
        
Answer:
15. -2  16. 0  17. undefined
Step-by-step explanation:
Slope of two points can be calculated by (y change) / (x change).
(y1 - y2) / (x1 - x2) 
15)  (1-5) / (4-2) = -2
16)  (6-6) / (1-10) = 0 since y change is 0.
17) (-5-3) / (4-4) = undefined since x change is 0 but you cannot devide by 0. 
 
        
             
        
        
        
4 / 0.80 = 12 / x...cross multiply
4x = 0.80 * 12
4x = 9.6
x = 9.6 / 4
x = 2.4.....12 apples cost $ 2.40
        
                    
             
        
        
        
Vertex form uses the following formula:

Identify the values of h and k in your function:


The vertex is found with the following point:


The vertex will be found at 
(-5, -28).