I dont know the answers to this question please tell me the x and y

Step-by-step explanation:

            -4x - 9y = -25

             7(-4x - 9y = -25)

            -28x - 63y = -175

Now, let's substitute the value of y into the first equation.

Now, let's check our answer to make sure our answer is correct.

Check:

Hence, this is proved correct.

Hoped 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⭐