What does the difference of the means of each group indicate? What makes the mean of one group greater or less than the mean of the other group?

The answer is

You need to include the original coordinates of the triangle to answer this. and how much does it translate (move left right up down)

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.