-5x-4y=15
6x+8y=-18
Solve each system by elimination

1) Multiply top equation by 2 -> -10x-8y=30

2) Add both equations:

 -10x-8y=30

+ 6x+8y=-18

  -4x=12

3) Divide both sides by -4 -> x=-3

4) Plug value of x into either equation:

6(-3)+8y=-18

-18+8y=-18

8y=0

y=0

So x=-3 and y=0

Hope this helped!

< 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⭐

answer: approximately 206 bones

i hope this u out a branlist and a would be greatly appreciated :