Need help with image, just need an understanding of how to do the work. I'm confused.

Answer:
10. the answer is 17 dollars
11. I would need to observe examples 5 and 6 to answer the question due to information being missing
12. I would need to observe examples 5 and 6 to answer the question due to information being missing
Step-by-step explanation:
10. 5n + 2
using the example of Vincent wanting to bowl 3 games, we can determine that n=3 because n is the number of games bowled. so the equation looks like 5(3) + 2 or 5 x 3 + 2.
5 x 3 = 15
15 + 2 = 17