Question

9 radical 7 divided by radical 28?? Help!?? :)

Answer 1

start off with your equation:
\[9\sqrt{7}\div \sqrt{28}\]

now radical 28 is the same as radical 4(7):
\[9\sqrt{7}\div \sqrt{4(7)}\]

The square root of 4 is 2, seven has no square root:
\[9\sqrt{7}\div2\sqrt{7}\]

Now your root 7's will cancel out:
\[9\div2\]

and 9/2 is 4.5:

4.5 is your answer :D