Please help , if you can help me with a few more problems that would be lovelyyy just hit my dms my insta is ynlness. a :)

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?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red