Find a formula for the n
th term,
T
n
, of an arithmetic sequence where the 5th term is 31 and the 9th term is 55.
Hence, or otherwise, find the 40th term of the sequence.

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?