Vgc

step by step

~

4x+28

Step-by-step explanation:

Distributive property is a(b+c)=ab+ac

4(x+7)

4*x=4x

4(x)=4*7

4*7=28

4x+28, which is our 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⭐

think the answer would beb