Idk if this really helps, but I put them into Desmos (free graphing thing) and this popped up
(a)

(b)we have 4 terms in this expression.
(c)+12 is the leading coefficient in

(d) constant is -45
Answer:
Step-by-step explanation:both are 1/6 of a chance
The answer to your question is option b because opposite angles in a quadrilateral are equal to one another