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How will (4-3x\le 10) be shown on the number line?

Answer and explanation

Correct answer: ([-2,\infty))

The direct answer is option A, [-2,∞). Solve step by step: 4-3x≤10. Subtract 4 from both sides to get -3x≤6. Now divide by -3. When an inequality is divided by a negative number, its sign reverses, so x≥-2. The solution includes -2 and all larger numbers, which is written [-2,∞). Option A is correct because the square bracket includes -2 and the interval extends rightward. Option B, (-∞,-2], represents x≤-2, the opposite direction. Option C, (-2,∞), points right but excludes -2, which is wrong because equality is allowed. Option D, (-∞,-2), points left and excludes -2, so it is doubly incorrect. On the number line, use a filled dot at -2 and shade right. The key mistake is forgetting to reverse the sign when dividing by -3.

Related tags

Linear-InequalitiesInterval-FormNegative-Division

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