I need firends bc my old account just got banned
plus free ponits

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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?