Which expressions are equivalent to this expression? 3(n+4) 3n+4 12+n+n+n 3n−12 2n+12+nwill

12+n+n+n

2n+12+n

Step-by-step explanation:

I took the test on K12 and this was the right answer

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

step-by-step explanation: