How do you write the decimal 8.517 in two other forms

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.

Extra points! find the missing dimension! need asap