Simplify the following expression and justify each step in your simplification. 5(7-x)+6x(3x+4)

The simplified form of the given expression is .

Step-by-step explanation:

The given expression is

We need to find the simplified form of the given expression.

Using distributive property we get

On further simplification we get

On combine like terms.

Therefore the simplified form of the given expression is .

< 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⭐

step-by-step explanation: