Answer:

Try to solve the similtanious equation to find the first term and the common difference, then use that information to figure out the 80th term... Update me if you need further help ...
Answer:
122.667
Step-by-step explanation:
23/3=7.667
7.667*16=122.667
It would be: 298*52 / 100 = 154.96
Approx. 155 students like scary movies
The irrational number would be square root 15