Please can I have some help

What is the solution set of the quadratic inequality x^2-5< or equal to 0

You work in a hospital that has 9 floors. you need to see 3 patients on each floor. how many patients do you need to see in all?

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?