How to solve (x+2)^2-(x+5)^2=0

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

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?

Which of the following best describes the delian problem?