Question

help please?!? 8th term: 22, 19.5, 17, ...

Answer 1

common difference is -2.5
so, 8th term= 22-2.5x7=22-17.5=4.5

Answer 2

Do you know how to find the common difference between terms? It's the amount that is added to a term to get the next term.

you can use the formula for an arithmetic sequence:
\[\Large a _{n} = a _{1} + (n – 1)d\]

a1 is the first term in the sequence, d is the common difference. You want the 8th term, so n = 8.