Answer:
D. 
Step-by-step explanation:
Determine the groups:
- 
Factor out terms: 
The -2 was factored out in the second group to ensure that both groups had
(x-12).
The third angle is obtuse.
Since the shape has 3 sides, then the total measure of degrees is (n-2)180 = (3-2)180 = 180°.
So our equation would be
180° = 35° + 30° + x°
x = 115°
115 is greater than 90, so the angle is obtuse.
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