Essay

Operating Cost Modeling: Recalling the Addition of Functions

An operations coordinator at a regional delivery service is combining two monthly expense models to create a total operating cost model. The package processing cost is modeled by f(x)=3x25x+7f(x) = 3x^2 - 5x + 7 and the fleet maintenance adjustment is modeled by g(x)=x24x3g(x) = x^2 - 4x - 3, where xx represents the number of active delivery routes.

To document this procedure for the department's standard operating guide, write an essay response that addresses the following:

  1. State the fundamental algebraic definition of the sum of two functions, (f+g)(x)(f+g)(x).
  2. Express the combined function (f+g)(x)(f+g)(x) by substituting the given polynomial expressions for f(x)f(x) and g(x)g(x).
  3. Identify which terms from f(x)f(x) and g(x)g(x) are like terms that should be grouped together.
  4. State the final simplified polynomial representing the total operating cost function.

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Updated 2026-06-04

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