A car rental costs $50 for the first day. Additional days cost $35 per day, unless the car is rented for 7 days or more, in whic
h case there is a 10% discount on the daily rate. Identify the expression which represents the cost of renting a car if the car has been rented for more than a week. A.) 45+35x
B.) 45+31.5x
C.) 50+35x
D.) 50+31.5x