Becoming a member at a fitness club costs$125 plus a monthly fee of $25 using the graph estimate how many months a person has been a member if he paid a total of $250

No solution : there is no number of boxes that she bought

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.