What are the answers to the one step equations problem

The circumference of a circle is 5 pi cm. what is the area of the circle?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?