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Which interval is formed on the number line when ( |x-6|<9 ) is represented?

Answer and explanation

Correct answer: \((-3,15)\)

The inequality \(|x-6|<9\) means that \(x\) is less than 9 units away from 6. Hence, \(-9<x-6<9\). Adding 6 to all three parts gives \(-3<x<15\), so the required interval is \((-3,15)\). Option \([-3,15]\) is incorrect because a strict inequality \(<\) does not include the endpoints \(-3\) and \(15\). Exam tip: Use open circles and open interval brackets for \(<\) or \(>\).

Related tags

Linear InequalitiesAbsolute ValueNumber LineOpen IntervalClass 11 MathematicsRepresentation On Number LineMathematicsClass 11 Mcq

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