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What is the correct number-line representation for 3(x-2)≥2(x+5)?

Answer and explanation

Correct answer: x≥16, closed at 16 and shaded right

The governing concept is solving a linear inequality and translating its solution to a number line. Expand both sides: 3(x-2)=3x-6 and 2(x+5)=2x+10. Thus 3x-6≥2x+10. Subtract 2x from both sides and add 6, giving x≥16. Equality is allowed, so the point 16 must be shown with a closed dot. Values greater than 16 satisfy the inequality, so the ray is shaded to the right. Therefore option A is correct. Option B incorrectly excludes 16, while options C and D shade the wrong side and represent values less than 16.

Related tags

Linear-InequalitiesAlgebraic-SolutionNumber-LineRepresentation On Number LineLinear InequalitiesMathematicsClass 11 Mcq

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