Answer:
2(x+10) = 3x-30 (reason: vertical angles are congruent)
2x+20 = 3x-30
20 = 1x-30
1x = 20+30
1x = 50
x = 50
It’s B if there are straight lines and B is there dot it but did u post the same question two times?
C=3.14 x 26
C=81.64
C=2(3.14 x 13)
C=81.64