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Elementary Mathematics
If x:y=7:3, then the value of \( \Large \frac{xy+y^{2}}{x^{2}-y^{2}} \) is
A) \( \Large \frac{3}{4} \)
B) \( \Large \frac{4}{3} \)
C) \( \Large \frac{3}{7} \)
D) \( \Large \frac{7}{3} \)
Correct Answer:
A) \( \Large \frac{3}{4} \)
Description for Correct answer:
x : y
7 : 3
Therefore, \( \Large \frac{xy+y^{2}}{x^{2}-y^{2}}=\frac{21+9}{49-9} \)
= \( \Large \frac{30}{40} = \frac{3}{4} \)
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1). If [p] means the greatest positive integer less than or equal to p, then \( \Large \left[ \frac{1}{4} \right]+\left[ 4-\frac{1}{4} \right]+\left[ 3 \right] \) is equal to
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