A. 4 (is the only factor for expression -48xyz -24xy +40)
Please, use " ^ " to denote exponentiation: x^2 + 4x - 21 = 0
Factor: (x+7)(x-3)=0
Solve for the 2 roots: x= -7 and x= 3: {3, -7} Note how this is in set notation.
Vertical angle is when opposite angles meet in the middle of two intersecting lines (share the same vertex). They are equal to each other too.
Hope this helps! :)
Answer:
Where is the image? I did something like this so if you are looking for that answer they are both the first one.