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Which description correctly represents -12 < x < -5 on the number line?

Answer and explanation

Correct answer: Open circles at -12 and -5, with shading between them

The governing concept is the graphical representation of a compound strict inequality. The statement -12 < x < -5 means that x must be greater than -12 and less than -5 simultaneously. Since both inequality signs are strict less-than signs, neither endpoint is included. Thus both -12 and -5 must be marked with open circles. The word ‘and’ requires the common region satisfying both conditions, which is the shaded segment between the two points. Therefore the interval is (-12, -5), and option A is correct. Option B incorrectly includes both endpoints. Option C includes -12 and does not describe the complete required marking, while option D represents values less than -12 rather than values lying between the endpoints.

Related tags

Linear-InequalitiesCompound-InequalityOpen-IntervalNumber-LineRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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