Case Study

HVAC Temperature Calibration Safety Standards

Based on the safety standards described in the case study, write a detailed technical memo to your supervisor that addresses the following:

  1. Recall and apply the algebraic steps to solve the first safety standard, 3x4<5{}3x - 4 < 5, for xx.
  2. Recall and apply the algebraic steps to solve the second safety standard, 4x+91{}4x + 9 \ge 1, for xx.
  3. Identify the overlapping range where both standards are simultaneously satisfied.
  4. Express the final safe operating range in standard interval notation, and explain the rules of interval notation regarding when to use brackets versus parentheses.

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Updated 2026-06-03

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