Answer:
down below
Step-by-step explanation:
straight lines are 180 degrees and you have 2 angles on a line. one of which is 72 and the other is unknown. It is solved for below.

your missing degree is 108.
i may not be right, if i'm not i am very sorry.
B. 6.72the answer is B 6.72
Answer:
y=1/2*(x-4)^2+13
Step-by-step explanation: