Answer:
Wait I just realized, none of them are cubic? for a polynomial to be cubic it needs to be 
20+4x=76 subtract 20 from both sides
4x=56 divide both sides by 4
x=14
So he was driving at 55+14=69 mph
The answer seems to be B. atleast I am 90 percent sure
Answer:
600
Step-by-step explanation:
Answer:
18 is the greatest common factor between those