How to write 9/18 into a equivalent fraction

There are many ways.  is actually the same as  so anything you do just has to have a numerator exactly half as the denominator. So one that would work is  I just doubled both numbers. Other ones would be  all of which the numerator is exactly half the denominator.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.