Can someone please help me answer this question asap thank you

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?

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Yvaries directly as x. y =90 when x=6. find y when x=13