How do i do this? i dont know how to work out his problem

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?

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Find the values of the variables in the kite