To find out how many more hours Tyrell needs to volunteer to reach his goal, we can set up the following equation:
\[ h + 17 = 26 \]
Here, \( h \) represents the number of hours Tyrell still needs to volunteer.
Now, we can solve the equation for \( h \):
- Subtract 17 from both sides of the equation:
\[ h = 26 - 17 \]
- Calculate the right side:
\[ h = 9 \]
Thus, Tyrell still needs to volunteer:
\[ h = 9 \]
So the final answer is:
\( h = 9 \)