Right △abc has coordinates a(-7, 3), b(-7, 10), and c(-1, 3). the triangle is reflected over the x-axis and then reflected again over the y-axis to create △a'b'c'. which are the coordinates of vertex a'?

The answers are 20,30,80,180,960,890,1230,4560. on the first row

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.