Which graph represents a linear function?

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

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?