To find the 10th term of the sequence defined by the formula \( a_n = 5n + 5 \), we substitute \( n = 10 \) into the formula.
\[ a_{10} = 5(10) + 5 \]
Calculating this:
\[ a_{10} = 50 + 5 \] \[ a_{10} = 55 \]
Therefore, the 10th term of the sequence is \( \boxed{55} \).