Question

A volleyball club charges players a $20 court fee plus a $10 hourly charge with a 4-hour maximum. A posted list of the total charges for 1, 2, 3, or 4 hours forms an arithmetic sequence. What is the second term and what is the common difference?

Answer 1

The second term in the sequence would be 40 and the common difference in 10.

Our list would start at 30, then count up by 10's.
30 40 50 60

It started at 30, because we had to pay $10 for the first hour, then add on the $20 court fee.