Answer:
The Thousandths Place.
Step-by-step explanation:
The 1 in 2.891 is in the thousandths place value.
2 (ones place value)
.
8 (tenths place value)
9 (hundredths place value)
1 (thousandths place value).
~
A' = 2,-2
B' = 2,-4
C' = 5,-4
-20
cause i did the math hope this helped :D
from both sides
to 
