Julio has c coins. He gives his sister 9 coins. He then splits the remaining coins into 2 equal stacks. Write an expression that represents the number of coins in each stack.

Answer: the expression is c/2 - 4.5

Step-by-step explanation:

Let c represent the total number of coins that he has initially.

He gives his sister 9 coins. This means that the remaining number of coins that he has is c - 9

He then splits the remaining coins into 2 equal stacks. Therefore, the expression that represents the number of coins in each stack would be

(c - 9) / 2

Simplifying further, it becomes

c/2 - 9/2

c/2 - 4.5