How would i factor #12? it seems it would be simple but i'm slightly confused

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)