CPM Homework Help : CCG Problem 7-89

What is the $50^{\text{th}}$ term in this sequence?

$17$ , $14$ , $11$ , $8$ , $\dots$

Hint:

Is this a geometric or arithmetic sequence?

More Help:

Use the formula for arithmetic sequences: $a_n=m(n−1)+a_1$

Answer:

$\begin{array}{l} a_{50}=-3(50-1)+17\\ \quad \;\; =-130 \end{array}$