Can you please help me I need to pass this quiz please I need help with 1a. 1b. And 1c. If I don’t pass this quiz I can’t play in my basketball game tomorrow !!

Simply 8x squared + 5(7x squared- x) - 2x =

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?

Find the solution of each of the following.