Correct Answer: Option A

Explanation

\(\frac{20}{5 \sqrt{4 \times 7} - 2\sqrt{9 \times 7}}\)

\(\frac{20}{10 \sqrt{7} - 6\sqrt{7}}\)

= \(\frac{20 \sqrt{7}}{4 \sqrt{7}}\)

= \(\frac{5\sqrt{7}}{7}\)

• what is isoelectronics series? Answer this

  2 Answers   ·   Chemistry   ·   1 day ago
• what is the cut off marks for lafia federal university? Answer this

  1 Answers   ·   1 day ago
• 49. Fill in the blank space with the correct word(s), from the options lettered A-D. In the sentence "The girl... Answer this

  4 Answers   ·   2 years ago