Show your work for this one

Step-by-step explanation:

1) Subtract 2 from both sides.

2) Simplify −8−2  to −10.

3) Multiply both sides by 2.

4) Simplify 10 * 2 to 20.

Therefor, the answer is n = - 20.

11

Step-by-step explanation:

So the sum of the angles is 18 × 90 = 1620

the formula to find number of sides is n which is sides - 2 into 180 equals sum of interior angles

(n-2)*180 = 1620

n-2 = 1620/180

n- 2 = 9

n = 11

hope this helped