Please help me with this will give BRAINLIST to best answer

Part a: solve –mk – 120 > 95 for m. show your work. (4 points) part b: solve 2c – 9f = 45 for f. show your work. (6 points)

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?

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie