We need to expand and add the formula
[tex]5n + 2[/tex]
from 3 to 6, inclusive.
[tex]5(3) + 2 \\ 5(4) + 2 \\ 5(5) + 2 \\ 5(6) + 2[/tex]
which is equal to
[tex]15 + 2 = 17 \\ 20 + 2 = 22 \\ 25 + 2 = 27 \\ 30 + 2 = 32[/tex]
The answer is D. 17 + 22 + 27 + 32