During a clothing store’s bargain days, the regular price for t-shirts is discounted by $5. there is a state sales tax of 5%, and the $5 discount is applied before the sales tax is calculated.
a. write an expression that shows the regular price r of a t-shirt minus the $5 discount.
b. write a rule for the function p(r) that expresses the final price p of a t-shirt with the discount applied and sales tax added.
c. how much would you pay during bargain days for a shirt regularly priced at $15.50?