Simplify 84 /144 to its lowest terms a 21/36 b 7/12 c 2/3 d 4/7

Anyone know? is appreciated! will mark brainliest if correct!

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

20 points plus brainliest andwer plus my hover hoard im v desperate ! evaluate the polynomial for x=-2 in the equation -3x^3+7x^2-7x-1 (simplify your answer)