Please Answer A, B, C, or D No work is needed THX

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?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Which of the following are accepted without proof in a logical system? check all that apply.