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.

A. p = 2(l + w)p/2 - l = ww = p/2 - l b. while isolating the variable w in the equation, i first divided both sides by 2 and then i subtracted l from both sides. i hope this .