1) D 
2) C
3) B
4) C
Hope this helps a lot
        
             
        
        
        
With the information provided, we can begin with the equation:
y=35x + b
With x = number of hours, y = total cost, b = fixed amount that is charged for residential work
We know that after 6 hours, $270 was charged:
$270 = $35(6) + b
Solve for b:
b = $270 - $210 = $60
The fixed amount that is charged for residential work is $60. So now we can rewrite the equation as:
y = 35x + 60
        
             
        
        
        
Answer:
i dont understand...the meaning?
Step-by-step explanation:
 
        
                    
             
        
        
        
X^2 + X - 12 = 0
(X + 4)(X - 3) = 0
X = -4 and X = 3.
        
             
        
        
        
The Correct answer to it is -14 - (-6) = - 8