A store is having a sale in which all items are discounted 20%. Including tax, Conner paid $21 for a picture. If the sales tax rate is 5%, what was the original price of the picture?

Which statement best describes fx)=- 2x-7+1? -6 is in the domain of f(x) but not in the range of f(x). -6 is not in the domain of f(x) but is in the range of f(x). -6 is in the domain of f(x) and in the range of f(x). -6 is neither in the domain of f(x) nor in the range of f(x).