Pls will give brainliest! Asap!

it is -11

Step-by-step explanation:

first thing you do is subtract 64 minus 75 and that will be the answer

-11

Step-by-step explanation:

64-75=-11

hope i helped :)

< 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⭐