Solve. 21r<7 i need helpp

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?

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?