f(b) = -1/6b + 8. Is the function rule if you want. further explanation just ask.
As we can notice the shape is a Pentagon. A Pentagon's angles should add up to 540. So we can use simple addition and subtraction to solve.
121 + 108 + 102 + 100 = 431
540 - 431 = 109
109 should be your answer
Answer:
its B i think
