Answer:
x ≥ 5
Explanation:
You want the domain of the equation y = √(x -5) -1.
Domain
The domain of the function is the set of x-values for which it is defined. The square root is not defined for negative values, so the domain is ...
x -5 ≥ 0
x ≥ 5 . . . . . . the domain of this function
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Additional comment
The range is the set of y-values the function may produce. Here, that set of values is y ≥ -1.
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