I will give you branilest!
Solve 1/3(x-10)= -4

x = -2

Step-by-step explanation:

Multiply both sides by 3 to get rid of the fraction:

x - 10 = -12

Add 10 to both sides:

x = -2

< 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⭐

the answer will be the last one