Answer:
infinitely many solutions
Step-by-step explanation:
Given the 2 equations
2x + 2y = 18 → (1)
x + y = 9 → (2)
Equation (1) is twice (2)
Thus the equations are equal and will have infinite solutions
C would be your answer i hope i helped you :) sorry if i’m incorrect. i’m not sure
-g(x) = g(x) this statement is true because of the commutative property
hope this helps