At a dog show, there were twice as many brown dogs as white dogs and 3 times as many grey dogs as white dogs. There were 342 dogs altogether. How many grey dogs were there?

The answer for this question is 80

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.