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What is the solution set of the compound inequality −3 ≤ (7 − 2x)/5 < 1?

Answer and explanation

Correct answer: 1 < x ≤ 11

Because 5 is positive, multiplying the entire compound inequality by 5 does not reverse either sign: −15 ≤ 7 − 2x < 5. Subtract 7 throughout to obtain −22 ≤ −2x < −2. Dividing by −2 reverses both inequalities, giving 11 ≥ x > 1. In standard increasing order, this is 1 < x ≤ 11, so option A is correct. The lower endpoint 1 is excluded because the original upper inequality is strict: at x = 1, the fraction equals 1. The upper endpoint 11 is included because the fraction equals −3 there, and that boundary is non-strict. Option B reverses the endpoint inclusion, while C and D retain only incorrect one-sided portions.

Related tags

Linear-InequalitiesCompound-InequalityFraction-InequalityClass-11Algebraic Solution Of Linear Inequalities In One VariableLinear InequalitiesMathematicsClass 11 Mcq

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