Short Answer

Interval Notation for Overlapping Environmental Safety Thresholds

An environmental safety officer is monitoring the runoff levels xx in a local stream. The runoff must satisfy two separate safety constraints: 5(3x1)10{}5(3x-1) \leq 10 and 4(x+3)<8{}4(x+3) < 8. Through preliminary calculations, the officer determines that the first constraint is met when x1x \leq 1 and the second is met when x<1x < -1. Based on the procedure for finding the intersection of these two conditions, what is the final overlapping safe range for xx expressed in interval notation?

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Updated 2026-05-26

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