Userihe replacement set {3, 4, 9} to find the solution of the equation below. 3n - 18 = 9 A 3 B. 4 C. 9 0 D. No solution

Agc and bgd are vertical angles

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.