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Which is the number line representation of (2x+1<9)?

Answer and explanation

Correct answer: Open circle at 4 and shading to the left

Given \(2x+1<9\), subtracting 1 from both sides gives \(2x<8\). Dividing by 2 gives \(x<4\). Thus, 4 is not included, so the number line has an open circle at 4 and is shaded to the left for all values less than 4. Option B represents \(x\le4\), incorrectly including 4. Exam tip: use an open circle for \(<\) or \(>\), and a closed circle for \(\le\) or \(\ge\).

Related tags

Linear InequalitiesNumber Line RepresentationStrict InequalityOne Variable InequalityClass 11 MathematicsRepresentation On Number LineMathematicsClass 11 Mcq

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