Answer :

Given the expression:

[tex](\frac{1}{3}+\frac{2}{7})+\frac{3}{4}[/tex]

We will write it as:

[tex]\frac{2}{7}+(\frac{1}{3}+\frac{3}{4})[/tex]

So, we will change the place of 1/3 and 2/7 which is the commutative property

Then, we will make the parenthetic over 1/3 and 3/4 which is the associative property

So, the answer will be option 1

The commutative property followed by associative property