Answer:
b) 0.1x - 16 is the correct option,
Reason,
-3.4x - 25 + 3x + 0.5x +9 (Perimeter of triangle = Sum of all sides)
=> (-3.4x + 3x + 0.5x) + (9 + (-25))
=> (-3.4x + 3.5x) + (-16)
=> 0.1x - 16
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