Assume that the standard rate for a player (in any of the teams) is

R75 000 a game. Write down the mathematical expression that will
determine the salary for a player based on the number of matches
played in a given month. The number of matches will be stored in a
variable called “Matches”.

The mathematical expression that will determine the salary for a player based on the number of matches played in a given month, where the standard rate per game is R75 000, is:

Salary = Matches * R75 000

To determine the salary for a player based on the number of matches played in a given month, you can use the following mathematical expression:

Salary = Matches * R75,000

In this expression, "Matches" represents the number of matches played by the player, and R75,000 represents the standard rate per game. By multiplying the number of matches by the standard rate, you can calculate the player's salary for that month.