What is the slope, or rate of change, of this graph?
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Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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?

Simplify the expression below -3(10x+4y)+6(6x-2y)