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What is the solution of -3 ≤ (x + 4)/2 < 5?

Answer and explanation

Correct answer: -10 ≤ x < 6

Use the order-preserving operations for a compound inequality. Begin with -3 ≤ (x + 4)/2 < 5. Multiply all three parts by 2, a positive number, so the signs remain unchanged: -6 ≤ x + 4 < 10. Subtract 4 from all parts to obtain -10 ≤ x < 6. Therefore option A is correct. The lower endpoint is included because the original left sign is ≤, and the upper endpoint is excluded because the original right sign is <. Options B and D wrongly exclude -10, while option C incorrectly includes 6. Substitution at the endpoints verifies the result: x = -10 gives equality on the left, whereas x = 6 makes the right inequality strictness fail.

Related tags

Compound InequalityFractionEndpoint InclusionAlgebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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