Use a model to divide 1/9 divided by 2

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

What is the 12th term of b(n)=-4-2(n-1)

List the sides of δrst in in ascending order (shortest to longest) if: a ∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12°