Which graph is used to model piece rate pay?

If f(x) = 3-2x and g(x) =1/x+5 to what is the value (f/g)(8)

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?