Delaney would like to make a 5 lb but mixture that is 60% peanuts and 40% almonds. she has several kinds of peanuts and several kinds of a mixture that is 20% peanuts and 80% almonds. let p represent the number of punts of peanuts needed to make the mixture, and let m represent the number of pounds of the 80% almond-20% peanut mixture. What is the system that models this situation