Step-by-step explanation:
1.
(chain rule)
2 

Answer:
6/9 = 2/3
Step-by-step explanation:
1/3 = 3/9
3/9 = 3/9
3/9 + 3/9= 6/9 = 2/3
Yes i believe thats it ok
Answer:
angle 9 measures 105 degrees
Step-by-step explanation:
measure of angle 8 is congruent to measure of angle 11 (alternate-interior angles are congruent)
measure of angle 11 is congruent to measure of angle 9 (corresponding angles are congruent)
therefore, measure of angle 8 = measure of angle 9