Write inequalities to represent the situations below.

To be eligible for financial aid, a student must earn at most $30,000 per year.
Use s to represent the yearly earnings (in dollars) of a student eligible for financial aid.

At the airport, each piece of luggage to be checked in must not weigh more than 45 pounds.
Use w to represent the weight (in pounds) of a piece of luggage that can be checked in.