If x = \(\frac{2}{3}\) and y = - 6, evaluate xy - \(\frac{y}{x}\)
MATHEMATICS
WAEC 2017
If x = \(\frac{2}{3}\) and y = - 6, evaluate xy - \(\frac{y}{x}\)
- A. 0
- B. 5
- C. 8
- D. 9
Correct Answer: B. 5
Explanation
x = \(\frac{2}{3}\) and y = - 6
xy - \(\frac{y}{x}\)
\(\frac{2}{3} - (6)^2 - (-6) \div \frac{2}{3}\)
= -4 - (6) x \(\frac{3}{2}\)
= -4 - (-6) x \(\frac{3}{2}\)
= -4 - (-9)
= -4 + 9
= 5
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