Indica en el paréntesis si se trata de una expresión algebraica(A), ecuación(E) o función(F)

Plz me plzzzzzzz i need and plz delte this after answer

Place the following steps in order to complete the square and solve the quadratic equation,

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?