Question

the sides of the triangle at right are formed by the graphs of 3x + 2y = 1, y = x -2, and -4x + 9y = 22. Is the triangle isosceles? How do you know?

Answer 1

How? I don't have x and y

Answer 2

@surjithayer ^

Answer 3

3x+2y=1
y=x-2
3x+2(x-2)=1
3x+2x-4=1
5x=5
x=1
y=1-2=-1
so co-ordinates of one vertex say A are (1,-1)
now consider
-4x+9y=22
y=x-2
-4x+9(x-2)=22
-4x+9x=22+18
5x=40
x=8
y=8-2=6
so co-ordinates of vertex say C are (8,6)
Again consider 3x+2y=1
-4x+9y=22