I would say B.
Hope this helped! 
:)
        
             
        
        
        
Answer:
$13.50
Step-by-step explanation: 
The total is $103.50. 
 
        
                    
             
        
        
        
Answer:
f(x) = (x - (-5))^2 + (-18)
Step-by-step explanation:
Given:
f(x) = x^2 + 10x + 7
Rewrite f(x) in vertex form
Solution:
f(x) = ax^2 + bx + c is a quadratic function.
The vertex form of f(x) is a(x - h)^2 + k, where (h, k) is the vertex.
=> f(x) = x^2 + 10x + 7 
           = x^2 + 10x + 25 - 18 
           = (x + 5)^ - 18
           = (x - (-5))^2 + (-18)
=> f(x) can be rewritten in form of a(x - h)^2 + k, where (h, k) is the vertex, with a = 1, h = -5, k = -18