# How do you find the domain of sqrt(2x+5)?

$2 x - 5 \setminus \ge q 0$, so $x \setminus \ge q \frac{5}{2}$.
When $x$ approaches $\infty$, the square root also approaches $\infty$, so the domain of $x$ is $\left[\frac{5}{2} , \infty\right)$.