There are two exam rooms X and Y. We are told the following: If 10 students are sent from X to Y, the number of students in each room becomes the same.

On the other hand, if 20 students are sent from Y to X, the number of students in X becomes double the number of students in Y.

Find the (original) number of students in each room:

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.

C

It’s 5 points actually