Answer:
b-65
Step-by-step explanation:
They give you 130 and so to get the next measure its 180-130 and you get 50. So the blank angle is 50. Then the next two angles are y which means theyre equal to each other so they have to be the same number. Get 180 again and subtract 50 and get 130. Split 130 in half and get 65.
Its 20. |-2|+4-(-2)×(7). This simplifies to 2+4+(2×7)
10^1 = .2
10^2 = 2.0
10^3 = 20.0
So, the answer is 3.
