This work provides a concise and comprehensive grounding in the principles of mathematical economics. It uses matrix algebra and calculus as the basis for explaining its core models: Input-Output, Linear Programming, Inventory Control, Game Theory, Markov Chains, and Regression Analysis. These basic models are then supported through numerous solved, "real world" examples related to business and economic problems. The book has no prerequisites other than high school algebra. It can be used as either a main text or a supplemental text for undergraduate courses, and is also useful for graduate-level students and professional economists.