Fill in the missing term on each line. Simplify any fractions. 2d + 10 = 10
2d =
Subtract 10 from both sides
d =
Divide both sides by 2

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.

The answer should be c.