Alicia is solving the equation shown. − 2( x + 1) + 10 = 4 − 2x

She wrote this as her first step.

x + 1 − 5 = − 2 + x

Which property justifies this first step?

A. additive identity property
B. addition property of equality
C. multiplicative property of zero
D. multiplication property of equality

D.

Step-by-step explanation:

-2 is divided on both sides of the equation, which is the multiplication property of equality. you aren't adding anything/ multiplying anything by 0

< 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⭐