How do you simplify (23x - 15y) + (4x + 45y)

subract x from a side il do 23x - 4x so the equation would be (19x - 15y) + 45y then subtract y from a side so ill do 45 y -15y which would be 30 y making the equation 19x + 30y

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.

< 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⭐