Answer:
she purchased 6 first class tickets and 2 normal tickets
Step-by-step explanation:
Try out this website or search "surface area of a triangular prism" in Google
http://www.ck12.org/geometry/Surface-Area-of-Triangular-Prisms/lesson/Surface-Area-of-Triangular-Pri...
1. 8
2. 15
3. 2
4. 1/2
5. 3
those are the answers in order, hope this helps!
Your answer should be 3a^2 + 5x + 9
