How many solutions does the system have? { y = − 3 x + 9 3 y = − 9 x + 9 ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ y=−3x+9 3y=−9x+9

it would open into a square depending on the type of envelope i’m not sure about the second part

the answer would be c

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.