Final answer:
To find the value of PP', we take the difference between PM and P'M. After subtraction, PP' is found to be 2x millimeters.
Step-by-step explanation:
The question asks us to find the value of PP' based on the given expressions for PM and P'M. We know that PP' is the difference between PM and P'M. Given PM = (3x - 5) millimeters and P'M = (x - 5) millimeters, we calculate PP' as follows:
- PP' = PM - P'M
- PP' = (3x - 5) mm - (x - 5) mm
- PP' = 3x - 5 - x + 5
- PP' = 2x mm
Therefore, the length of PP' is 2x millimeters.