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What is the simplified form of [-2, 5] ∪ [5, 8) on the number line?

Answer and explanation

Correct answer: [-2, 8)

The union symbol ∪ combines every value belonging to either interval. The first interval covers -2 through 5, including both endpoints. The second covers 5 through values less than 8; it includes 5 but excludes 8. Because both intervals meet at 5 and 5 is included, there is no gap between them. The combined coverage therefore starts at -2, includes -2, continues through 5, and ends just before 8. Its simplified form is [-2, 8), so option C is correct. Options A and B retain only one original interval, while D excludes -2 and incorrectly includes 8.

Related tags

Linear-InequalitiesUnionIntervalsRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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