Answer:
If you need the y-intercept of that equation it is 5
Step-by-step explanation:
subtract the 5x to the other side to get y=-5x+5
6 songs
The way to find this answer is to divide 18 by 3, which is six, which means that after every six songs a commercial is played.
Hope this was helpful and that I explained it correctly.
13.1
Explanation
5.9+7.2=13.1