Iam playing a walking game with myself. on move 1, i do nothing, but on move $n$ where $2 \le n \le 25$, i take one step forward if $n$ is prime and two steps backwards if the number is composite. after all 25 moves, i stop and walk back to my original starting point. how many steps long is my walk back?

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.

For the sequence [tex]a_{n} = 2n/(n+1)[/tex], what is the value of [tex]a_{10}[/tex]

The sum of five and a number n is at least 12