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If 2x + 5 is at least 13, what is the correct conclusion for x?

Answer and explanation

Correct answer: x ≥ 4

The phrase “at least 13” means greater than or equal to 13, so the inequality is 2x + 5 ≥ 13. Subtracting 5 from both sides gives 2x ≥ 8. Dividing by 2, which is positive, preserves the direction of the inequality and yields x ≥ 4. The equality case must be included: when x = 4, the left side is 2(4) + 5 = 13, which satisfies the phrase “at least.” Thus option A is correct. Option B incorrectly excludes x = 4 by using a strict sign. Options C and D reverse the direction and describe values that generally make 2x + 5 less than 13. The endpoint and direction are both essential.

Related tags

Linear-InequalitiesAt-LeastAlgebraic-SolutionOne-VariableAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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