Example

Practice: Modeling a Trailer Capacity Application with a System of Linear Inequalities

Applications involving systems of linear inequalities can model physical constraints like weight and volume limits. For instance, a trailer can carry a maximum weight of 160160 pounds and a maximum volume of 1515 cubic feet. Microwaves weigh 3030 pounds and have 22 cubic feet of volume, while printers weigh 2020 pounds and have 33 cubic feet of space. To model this situation, one translates the conditions into a system of inequalities representing the weight and volume constraints, alongside the requirement that both quantities must be positive. By graphing the system and appropriately naming the axes for the chosen variables, one can visually identify the feasible region and test if specific combinations—such as carrying 44 microwaves and 22 printers, or 77 microwaves and 33 printers—are valid solutions.

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Updated 2026-05-25

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