Andrew needs to rent a car for a one-week trip through colorado. he is considering two different rental companies: the mile high rental company which charges $160 per week plus 20¢ per mile and the rocky mountain rental company which charges $200 per week plus 10¢ per mile. if x = the number of miles driven during the week and y = the total rental cost (in dollars) for the week, which two of the following equations correctly model the rental cost for one week for these two companies?