B would be at 4 since b+5 = 9
subtract 5 from both sides
b = 4
The transformation is a reflection in the line

followed by a reflection in the line

.
The mapping for a reflection in the line

is

.
That is simply swapping the coordinates.
Now we reflect the resulting coordinates in the line

which has the mapping
So we transform the resulting coordinates as follows:
Hence we have
A rate shows how much larger or smaller one box is to the other box.
(x+1)(x+6)(x-4)
The least common multiple (LCM) of two or more non-zero whole numbers is the smallest whole number that is divisible by each of those numbers. In other words, the LCM is the smallest number that all of the numbers divide into evenly.
Hope This Helps & Good Luck