Help out please and thank you

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.

Complete the statements about the system of linear equation respresented by the tables the equation respented the left table is

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7