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If x > 0, what is true about -2x?

Answer and explanation

Correct answer: -2x < 0

The governing concept is the sign rule for multiplication and the meaning of a strict inequality. Since x > 0, x is positive, while −2 is negative. The product of a negative number and a positive number is negative, so −2x < 0. The inequality remains strict because x cannot equal zero; consequently, −2x cannot equal zero either. Option B is false because the product is not positive. Option C is impossible because it would require x = 0. Option D is also false: a negative number is not greater than or equal to zero. Therefore option A is the only statement that follows for every positive value of x.

Related tags

Linear InequalitiesSign RulesPositive And Negative NumbersInequality ConceptsIntroduction To InequalitiesMathematicsClass 11 Mcq

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