Essay

Verifying Inventory Weight Formulas in Logistics

At a logistics warehouse, a shipping supervisor uses the function f(x)=5xβˆ’1f(x) = 5x - 1 to calculate the total billed weight (in pounds) of a shipment containing xx boxes, and the function g(x)=x+15g(x) = \frac{x+1}{5} to reverse the calculation and retrieve the box count xx from a given billed weight.

During an annual system audit, the supervisor is asked to write a brief report explaining how to algebraically verify that these two functions are true mathematical inverses of each other.

Write an essay response that recalls and outlines:

  1. The specific algebraic condition (using function compositions) that must be satisfied for two functions to be inverses of each other.
  2. The step-by-step substitution and algebraic simplification of the composition g(f(x))g(f(x)) to show it simplifies exactly to xx.
  3. The step-by-step substitution and algebraic simplification of the composition f(g(x))f(g(x)) to show it simplifies exactly to xx.

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Updated 2026-06-05

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