Rewrite the following equation as a function of x. 680x + 10y -1000 = 0

y= -68 x + 100

Step-by-step explanation:

subject y as in the form of y= mx+ c

we get

10 y= -680 x + 1000

now we can divide every term by 10 as to obtain least values

Therefore :y= -68 x+ 100

< 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⭐