Final answer:
To write a mathematical sentence expressing the given information, you can use the equation: 150 - x = 142, where 'x' represents the number of employees that quit or were fired.
Step-by-step explanation:
To write a mathematical sentence expressing the information given, we can use the variable 'x' to represent the number of employees that quit or were fired. The sentence can be written as:
150 - x = 142
This equation represents the initial number of employees (150) minus the number of employees that quit or were fired (x), which equals the final number of employees (142).