Math Problem Statement

Sheila knows that the minimum daily requirements for her dog's diet are 18 units of protein and 30 units of carbohydrates. Pet dog food costs $1.65 a can, contains 2 units of protein and 6 units of carbohydrates. Budget dog dood costs $1.35 a can, contains 2 units of protein and 2 units of carbohydrates. What combination of the two brands of dog food should sheila give her dog each day to ensure it has a proper diet at minimum cost?

Solution

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Math Problem Analysis

Mathematical Concepts

Linear Programming
Optimization
Algebra

Formulas

Cost = 1.65x1 + 1.35x2
Protein constraint: x1 + x2 ≥ 9
Carbohydrate constraint: 6x1 + 2x2 ≥ 30

Theorems

Linear Inequality Theorems
Optimization Principles

Suitable Grade Level

Grades 9-12