Which are equivalent expressions? Check all that are true.

2a · 2b = 2ab

6a = 6 · a

5a = 5 + a

3ab = 3c

2a · b = 2ab

< 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⭐

yes

step-by-step explanation:

2x^2+5x+17

your welcome. : )

yes

step-by-step explanation:

yes