Multiple Choice

In a manufacturing plant, a technician monitors the core temperature calibration metric, xx, of a machine. The machine operates safely only when both of these parameter conditions are satisfied simultaneously: 3x4<5{}3x - 4 < 5 and 4x+91{}4x + 9 \ge 1. Recalling the steps to solve this specific "and" compound inequality, which interval notation represents the final safe operating range where the solutions overlap?

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Updated 2026-05-20

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