I believe this is right:
Least: 8 (length) x 1 (width) = 8
Greatest: 5 (length) x 4 (width) = 20
Difference: 20 - 8 = 12

The Correct choice is ~ A

Because the two lines are parallel, the given angles forms Corresponding angle pair. and therefore they have equal measures.
If you want to make 10, you can take 3 from the 13 and add it to the 7. You will then have 10+10 which equals 20.
The answer to this equation is 48.
The answer is C) y=-5/2x-3