Rectangle PQRS will be reflected over the y-axis. What will be the coordinates of Q'M

Are triangles the congruent? write the congruency statement. what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

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?

Need plz been trying to do it for a long time and still haven’t succeeded