The phrase "twice the sum of a number and 5" can be mathematically expressed as follows:
- "the sum of a number and 5" translates to \( x + 5 \).
- "twice the" means to multiply by 2.
Putting these together, we get:
\[ 2(x + 5) \]
Therefore, the correct expression that represents the phrase is:
2( x + 5).