Solve for x: 23 = -4n + 15 – 8n + 2

please help

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?

What is the x-intercept and y-intercept of the equation 2x+1. 2o

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "