6. what are the mean and the mode of the following set of data: 5, 12, 1, 5, 7

Mode is 5 and mean is 6:))

The mean =(5+12+1+5+7)/5 =30/5=6
the mode =5

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.