Music company A charges a $15 membership fee and $0.75 each to download a song. Music company B charges $0.90 each to download a song with no membership fee.
A. For what number of songs will both companies charge the same amount? Justify your answer using mathematics.
B. your anticipate that you will download 150 songs. Which company should you choose if you want to spend the least amount of money? Justify your answer using mathematics.