Answer:
so the answer would be C: 8
Step-by-step explanation:
This is because first you have to find the scale factor. The way you would find it would be by dividing one side of a triangle by the other side of the other trianle that corresponds, So for example, AB/DE=12/24=1/2
So the scale factor would 1/2.
To find x, we would have to have a number equal to 20, because it would be half of 40.
3x-4
3(5)-4
11 (A wouldn't be it, because it is not 20)
3x-4
3(10)-4
26 (B wouldn't be it, because it is not 20)
3x-4
3(8)-4
20 (C would be it, because it is 20!!!)
3x-4
3(6)-4
14 (D wouldn't be it, because it is 14)
Good luck:)
