https://es-cl.khanacademy.org/math/algebra/x2f8bb11595b61c86:inequalities-systems-graphs 2025-11-20T17:56:31.732617198Z Inequalities (systems & graphs) If it takes someone in a cooking competition 30 seconds to chop an onion and 18 seconds to chop a carrot, and their goal is to chop at least 20 of these vegetables in a time limit of 540 seconds, what can they do? Use a system of linear inequalities, of course. **Unit guides are here!** Power up your classroom with engaging strategies, tools, and activities from Khan Academy’s learning experts. [**PDF**](https://bit.ly/3NHzqdg) unit