In 1904, a dictionary costs 30 cents. since then the cost of a dictionary has risen an average 6 cents per year.
write a linear equation to find the cost (c) of a dictionary (y) years after 2004.

The linear equation could be y=6x+30 where x represents the number of years since 1904. there fore to find the dictionary after 2004 then you woud  make x=100 then you can solve for y which would be the cost of the dictionary in cents.

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.