Please answer this! I need help

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)