SOLUTION: The rule below shows that the cost of a plumbing repair depends on the hours of labor plus a travel charge. Multiply the hours of labor by $40 and then add $30. Which equati

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The rule below shows that the cost of a plumbing repair depends on the hours of labor plus a travel charge. Multiply the hours of labor by $40 and then add $30. Which equati      Log On


   

Question 1029871: The rule below shows that the cost of a plumbing repair depends on the hours of labor plus a travel charge.
Multiply the hours of labor by $40 and then add $30.
Which equation represents the total cost of a plumbing repair if C is the cost of the repair and h is the hours of labor?
A. C(h) = 40h + 30
B. C(h) = 30h + 40
C. C(h) = 30h - 40
D. C(h) = 40h - 30
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
$30 is always charged, so the answer must have a +30. That alone will give you a.
The other part is 40*h, which must be added to it.