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What is the solution of (-5x + 4 ≤ -16)?

Answer and explanation

Correct answer: (x ≥ 4)

The governing rule is that an inequality reverses direction when both sides are divided or multiplied by a negative number. Start with -5x + 4 ≤ -16. Subtract 4 from both sides to obtain -5x ≤ -20. Now divide by -5. Because -5 is negative, the symbol changes from ≤ to ≥, giving x ≥ 4. Hence option B is correct. A quick check confirms this: x = 4 gives -5(4) + 4 = -16, so the endpoint is included; x = 5 gives -21, which is also less than -16. Options A and C retain or assign an incorrect direction, while option D has the wrong boundary value. The solution set is [4, infinity).

Related tags

Linear-InequalityNegative-CoefficientSign-ReversalAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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