(need algebra help!)The cost of a car rental is $230 per week plus $0.12 per mile driven. Taxes and fees for this rental are included in the weekly fee.
a) Find an expression for the cost for renting the car for the week.

b) The total cost of the rental is $338. Write an equation for this situation.

c) Another car rental company has a discount code for $15 off per day and this rental comes with with unlimited miles. The sale price for renting this car for 5 days is $160. Write an equation for this situation where dd is the regular daily rental price.