You need a plumber to fix a leak in the bathroom. Plumber A charges $45 for the visit and $35 per hour. Plumber B charges $65 per hour. Let x represent the number of hours the plumber works and y represent the total cost. Which system of equations could be used to choose a plumber?
a) y=45+35x and y=65x
b) y=35x+65 and y=45+35x
c) y=45x+35 and y=65x
d) y=65+35x and y=45x