Short Answer

Identifying Restrictions in Combined Performance Models

A data analyst is combining two performance metrics, represented by the rational expressions 11x+28x+4\frac{11x+28}{x+4} and x2x+4\frac{x^2}{x+4}, to create a single evaluation score. According to the procedure for adding these rational expressions, what is the restricted value for the variable xx, and what algebraic rule requires this restriction?

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Updated 2026-05-25

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