Answer:
1 1/3
Step-by-step explanation:
The answer you want is going to be A.
Hope it helps.
12a+8b-28
Distribute
4(3a+2b-7)
4×3a=12a
4×2b=8b
4×-7=-28
So
Answer: 13
180 - (154 + 13) = 13
the triangle is isosceles