Which shows the use of the commutative property? 3(7+n)=21+3n
7+(3+ n) = (7+3)+n
3n+7=7+3n
(7+3)+n=10n
please answer I am doing a unit test <3 100 points

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4