30.) You have $47 to spend at the music store. Each cassette tape costs $5 and each CD costs $10. Write a linear inequality that represents this situation. Let x represent the number of tapes and y the number of CDs.


a.) 10x + 5y ≤ 47


b.) 5x + 10y ≤ 47


c.) 5x + 10y ≥ 47


d.) 10x + 5y ≥ 47