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Which inequality has solution x≤−1?

Answer and explanation

Correct answer: −2x≥2

The key concept is reversing an inequality when dividing by a negative number. Test option A directly: −2x≥2. Divide both sides by −2, and reverse the sign, obtaining x≤−1. Thus its solution set is exactly the one requested. Option B would give x≥−1 because the sign reverses during the same division. Option C gives x≥−1 because division is by positive 2 and the direction stays unchanged. Option D gives x<−1, which excludes the endpoint −1 and therefore is not equivalent to x≤−1. The endpoint is important: x=−1 satisfies option A as equality. Hence option A is the only correct inequality.

Related tags

Reverse-SignIdentify-InequalityLinear-InequalityAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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