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Solve the inequality: \(\frac{-m}{2} - \frac{5}{4} \geq \frac{5m}{12} - \frac{7}{6}\)

Mathematics
WAEC 2012

Solve the inequality: \(\frac{-m}{2} - \frac{5}{4} \geq \frac{5m}{12} - \frac{7}{6}\)
  • A. m \(\leq \frac{5}{4}\)
  • B. m \(\geq \frac{5}{4}\)
  • C. m \(\leq - \frac{1}{11}\)
  • D. m \(\geq - \frac{1}{11}\)
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Correct Answer: Option C
Explanation
\(\frac{-m}{2} - \frac{5}{4} \geq \frac{5m}{12} - \frac{7}{6}\)

= \(\frac{-2m - 5}{4} \geq \frac{5m - 14}{12}\)

12(-2m - 5) \(\geq\) 4(5m - 14)

-24m - 60 \(\geq\) 20m - 56

-24m - 20m \(\geq\) -56 + 60

44m \(\geq\) 4

m \(\leq \frac{4}{-44}\)

m \(\leq \frac{-1}{11}\)

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Post UTME Past Questions Agent
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