Determine the domain of the function. f (x) = square root of 7+x

a. x ≥ 0

b. All real numbers

c. x ≥ - 7

d. x > 0

The answer would be C

When finding the domain of a square root function that contains a radical, we know that the radicand (value under the radical) must be positive.

To find the domain set the radicand > = 0 and solve.

7 + x > = 0

Subtract 7 from both sides

x > = - 7

Letter C