fill in the blank to describe this inequality with interval notation. x ≥ 3

Explanation:

Step1: Understand interval notation rules

In interval notation, a square bracket [ is used when the endpoint is included (for $\geq$ or $\leq$), and a parenthesis ( or ) is used when the endpoint is not included (for $>$ or $<$). Since $x\geq3$, the number $3$ is included.

Step2: Determine the symbol for the left - hand side

For the lower - bound $3$ (included) and the upper - bound $\infty$ (which is never included, so we use a parenthesis for $\infty$). The interval notation for $x\geq3$ is $[3,\infty)$.

Answer:

The symbol for the left - hand side (the blank before 3) is [ (so the interval notation is $[3,\infty)$)