II. Direction: Write TRUE if the statement is correct and FALSE if not.
_______16. A mathematical system consists of set elements.
_________17. Theorems are assertions about the properties of the universe and rules for
creating and justifying more assertions.
_______18. The additive inverse of 7 is -7.
*
______19. For any three elements x, y, z in S, (X*Y) *Z =x* (y* z), the operation is said to
be associative.
______20.Mathematical system is a structure formed from undefined objects only.​