Which of the following explains why the given radical is not in simplest form?

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9