How do u find the perimeter of somthing

Agrocery store has 12 lb of trail mix that is 10% banana chips. the store's manager would like to add banana chips to bring the new mix up to 25% banana chips. write and solve a system of equations to find out how many pounds of banana chips manager needs to add.

How can you tell when x and y are not directly proportional?

For the inequality |c| < |d| to be true, which of the following must be true?