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Which inequality is satisfied by x = 2?

Answer and explanation

Correct answer: 5 − x ≥ 3

The governing concept is substitution into each inequality, followed by a direct comparison. Put x = 2 into option A: 3(2) − 1 = 5, and 5 > 7 is false. In option B, 4(2) + 2 = 10, so 10 ≤ 9 is false. In option C, 5 − 2 = 3, and 3 ≥ 3 is true because a greater-than-or-equal relation includes equality. In option D, 2(2) + 6 = 10, so 10 < 9 is false. Therefore option C is the only inequality satisfied by x = 2. This question also tests the distinction between strict symbols > or < and inclusive symbols ≥ or ≤; ignoring equality would incorrectly reject option C.

Related tags

Linear InequalitiesSubstitutionComparisonEquality CaseMathematicsClass 11 McqIntroduction To Inequalities

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