A couch and coffee table cost a total of $1252. The cost of the couch is three times the cost of the coffee table. Find the cost of each item. Cost of couch:
Cost of coffee table:

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.