What kind of property is used in the following example? 3 x 7 = 7 x 3

Identity Property

Associative Property

Distributive property

Commutative Property

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

Secant be and cf intersect at point d inside a what is the measure of cde