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Solve the inequality (2.2x-1.1\ge 4.4-0.5x).

Answer and explanation

Correct answer: (x\ge \frac{55}{27})

The correct answer is option A: x ≥ 55/27. Begin with 2.2x − 1.1 ≥ 4.4 − 0.5x. Add 0.5x to both sides: 2.7x − 1.1 ≥ 4.4. Add 1.1: 2.7x ≥ 5.5. Write decimals as fractions: 2.7 = 27/10 and 5.5 = 55/10. Dividing by 2.7, which is positive, gives x ≥ 5.5/2.7 = (55/10)/(27/10) = 55/27. Option A matches. Option B reverses the inequality without a negative division. Option C changes ≥ to >, wrongly excluding equality. Option D reverses the direction and also uses a strict sign. Checking x = 55/27 gives equality, so the endpoint must be included. The duplicated slash in the options appears to be formatting, but the intended mathematical answer is clear. Memory cue: only a negative multiplier or divisor reverses an inequality sign.

Related tags

Linear InequalitiesDecimalsHardClass 11

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