Its an isosceles triangle and just for future reference, you can google the types of triangles and you will find websites with definition and answers
Its 12y - 9 because when u add twelve pluus 12 it 24 then -21 is to 3 which 12 - 9 is 3
Answer:
Step-by-step explanation:
The coefficient of the second term is the 3 in (4x+3y)