may somebody help me please and thank you.

Here is your answer
C. 14x+2
REASON:
Given length of sides are:
3x+2, 6x and 5x
To find perimeter, add the length of three sides, i.e.
(3x+2)+6x+5x
=3x+2+6x+5x
...bring like terms together
=3x+6x+5x +2
=14x+2
HOPE IT IS USEFUL