If f (x) = StartRoot 4 x + 9 EndRoot + 2, which inequality can be used to find the domain of f (x) ? StartRoot 4 x EndRoot greater-than-or-equal-to 0 4 x + 9 greater-than-or-equal-to 0 4 x greater-than-or-equal-to 0 StartRoot 4 x + 9 EndRoot + 2 greater-than-or-equal-to 0

Answer:D on edge

Step-by-step explanation: no cap

Step-by-step explanation:

"f (x) = StartRoot 4 x + 9 EndRoot + 2" should be written as

Note that √ (4x + 9) is a variation of the basic function y = √x, whose domain is [0, ∞).

The domain of f (x) = √ (4x + 9) + 2 is found by taking the "argument" 4x + 9 of √ (4x + 9) and setting it equal to zero:

4x + 9 ≥ 0, or

4x ≥ - 9, or

x ≥ - 9/4

This is the domain of the given function f (x) = √ (4x + 9) + 2. So long as x is ≥ - 9/4, the function f (x) will be defined.