Essay

Conveyor Belt Safety Range Calibration

Imagine you are a Senior Logistics Associate preparing a short training manual for new operators at a distribution center. The center uses automated safety gates where the safe belt speed variance xx must satisfy two automated guidelines simultaneously: 4x7<9{}4x - 7 < 9 and 5x+83{}5x + 8 \geq 3.

Write a brief guide for the trainee explaining how the system determines this safe operating range. In your guide, you must recall and state the following details from your training material:

  1. Show how to solve the first inequality, stating both the intermediate step 4x<16{}4x < 16 and the final simplified inequality x<4x < 4.
  2. Show how to solve the second inequality, stating both the intermediate step 5x5{}5x \geq -5 and the final simplified inequality x1x \geq -1.
  3. Recall and describe how the boundary values -1 and 4 are treated on a graph of the overlapping solution (explicitly state which boundary is included and which is excluded).
  4. State the final safe operating range expressed in interval notation.

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Updated 2026-06-18

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