Pls help
I will award brainlist thing
Pls answer all the questions

7.) slope=-2/5   y-intercept= -2  

8.)   slope= -4/9 y-intercept=-3

9.)   slope=1/5  y-intercept=5

10.)m= -3

 11.)m=  2/5

12.)m=2.5

Step-by-step explanation:

< 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⭐