At what point do the graphs of the equations 9x−2y=30 and x+2y=10 intersect?
A
(2, 4)

B
(3, 4)

C
(4, 2)

D
(4, 3)

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Step-by-step explanation:

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step-by-step explanation:

< 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

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