Answer:
53
Step-by-step explanation:
50 - 12 = 38
38 + 15 = 53
18/4
-31/30
-3/5 - 7/10 + 4/15 = -31/30
D
I just took it
The scale factor is the ratio of the corresponding sides, image to original, that is
scale factor = = = 2 → D