Use elimination to solve the following system of equations: 17x - 2y = 25,17x + 3y = 5

Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.

(1,-4)

< 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⭐