Write 16x^2 + 25y^2 - 32x -159 =0
in standard form

What is the size of the matrix resulting from

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?

Do you mind if you guys me with this question i’m on number 8