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What is the interval form of (x+9≥2)?

Answer and explanation

Correct answer: [-7,∞)

The governing concept is solving a one-variable linear inequality and translating its solution set into interval notation. Starting with x+9≥2, subtract 9 from both sides to obtain x≥−7. Since equality is allowed, −7 belongs to the solution set and must be written with a square bracket. Values greater than −7 continue without an upper bound, so the right endpoint is infinity, which always uses a parenthesis. Therefore the interval is [−7,∞), option A. Option B wrongly excludes −7, while C and D describe values less than −7 and reverse the direction of the solution.

Related tags

Linear InequalitiesInterval NotationClass 11Introduction To InequalitiesMathematicsClass 11 Mcq

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