1. The rules for adding and subtracting rational expressions are the same as the rules for adding and subtracting numerical fractions. *

True
False

the answer is true

hope it 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⭐

true

step-by-step explanation:

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