Thanks Have a blessed day! MATH please help

B

Step-by-step explanation:

Substitute each value of x into the left side of the equation and if equal to the right side then it is a solution.

x = 3

24 - 3 = 21 ≠ 20 ← not a solution

x = 7

24 - 7 = 17 ≠ 20 ← not a solution

< 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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