Answer:
n/a
Step-by-step explanation:
A. t(h) = 5.5h + 50
B.  t(6) = 5.5(6) + 50
     t(6) = 85
C.  (6, 85) This means that when the electrician for 7 hours, they get paid $85
     
     
 
        
                    
             
        
        
        
Answer:
-4
Step-by-step explanation:
Given function 
f(x) = -2x² + 3x - 4 
Comparing with ax² + bx + c We get 
c = - 4 
Hope it will help :)❤
 
        
                    
             
        
        
        
The 18th month he will have to change both, 
     I hope this helped!
        
                    
             
        
        
        
Answer:
2x - y = 9
Step-by-step explanation:
The equation of a line in standard form is 
Ax + By = C ( A is a positive integer and B, C are integers )
Rearrange y + 1 = 2(x - 4) into this form
y + 1 = 2x - 8 ( add 8 to both sides )
y + 9 = 2x ( subtract y from both sides )
9 = 2x - y ⇒ 2x - y = 9 ← in standard form