Final answer:
The correct statement that must be true if the domain of the square root function f(x) is x < 7 is a) 7 is subtracted from the x-term inside the radical.
Step-by-step explanation:
The correct statement that must be true if the domain of the square root function f(x) is x < 7 is a) 7 is subtracted from the x-term inside the radical.