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By which interval will -3≤2x-1<9 be shown on the number line?

Answer and explanation

Correct answer: [-1,5)

The governing concept is solving a compound linear inequality while preserving endpoint inclusion. Start with -3≤2x-1<9. Add 1 to all three parts, giving -2≤2x<10. Since division by the positive number 2 does not reverse either inequality sign, divide throughout by 2 to obtain -1≤x<5. The left endpoint is included, so it receives a square bracket; the right endpoint is excluded because the inequality is strict there, so it receives a parenthesis. Thus the interval is [-1,5), making option A correct. Options B reverses the endpoint inclusion, while C and D use incorrect boundary values.

Related tags

Linear-InequalitiesCompound-InequalityInterval-NotationRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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