15 points
grade 7 math

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?

What is coefficient of the term of degree of degree 5 in the polynomial below

Solve the formula ax+ by = c for x.