Which expression represents the phrase "three times the sum of a number and 4"?

The phrase "three times the sum of a number and 4" can be expressed mathematically as follows:

Let's denote the unknown number as \( x \).

The sum of the number and 4 can be written as \( x + 4 \).

Now, three times this sum is represented as:

\[ 3(x + 4) \]

So, the expression that represents the phrase is:

\[ 3(x + 4) \]