If two lines intersect, then they what in exactly one point

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?

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

27 is what percent of 108? 27 is % of 108