Really easy question practically free points

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?