I'm having a lot of trouble figuring out how to evaluate this problem:
$$\dfrac{7}{\frac{7\sqrt{85}}{85}}$$
Everything I've found says that the answer is just $1\sqrt{85}$, but I have no idea how to get there. The best thing I can figure out how to do is to cut it down to $$7 \cdot \frac{85}{7\sqrt{85}}$$
Can anyone help me with this? Thank you!
$7 \div {\frac{7\sqrt{85}}{85}}=7 * \frac{85}{7\sqrt{85}}=\frac{85}{\sqrt{85}}=\sqrt{85}$
Basically this is just a game of cancelling from numerator and denominator.