Which expression is equivalent to -)

=-2 *The answer should be the negative sign.*

Step-by-step explanation:

-6-(-4)

its should be the plus sign. That means it's going to be add.

-6+4=-2

=-2

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answer: d. $20

step-by-step explanation:

just took the test

< 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⭐