fill in the blank to describe this inequality with interval notation. x < 4

Explanation:

Step1: Identify the type of interval

Since $x < 4$, 4 is not included in the interval. We use an open - interval for the upper - bound. Also, the values of $x$ go all the way to negative infinity. Negative infinity is always represented with an open - interval.

Step2: Write the interval notation

The interval notation for all real numbers $x$ such that $x < 4$ is $(-\infty,4)$.

Answer:

$(-\infty,4)$