Why do girls get mad if you talk about boobs

Which of the following are accepted without proof in a logical system? check all that apply.

How do you determine whether a relationship represented as as graph is linear or nonlinear

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?