The first term in the sequence below is 2 .
2,-5,-12,-19,-26
which expression can be used to find the nth term in this pattern?

-7n+2

-2n+7

-7n+9

n-7

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.