State the property of mathematical system given in each item below. Choose your answer inside the box and write the letter of the correct answer on the space provided before each item. *Parentheses indicate multiplication operation. A. Identity B. Commutative C. Distributive D. Inverse E. Associative 1. (3x + y) + 5 = 3x + (y + 5)
2. (12) (1) = 12
3. 11 + 2x = 2x + 11
4.3(21. - 1) = 6n - 3 __
5. (B) () = 1
6. d + e + f) = (d + e) + f
7.1 + (-1) = 0
8. m(n + o) = mn + mo
9.(6) (9) = (9) (6)
10.9 + 0 = 9​