You can add a lot of numbers (or so I think). One number I think you can add is 31.
The pentagon was reflected across the x-axis. By looking at Point A, you can see x was increased 8, x+8. Also, y was increased by 2, y+2.
Answer:

Step-by-step explanation:

After removing one black marble:

lines a and d are parallel and lines b and c are parallel
The scale factor of dilation is 1/2 or

because the number of rectangle one is multiplied by 1/2 to make rectangle 2
good luck