Final answer:
To split $9 in Bingo winnings between x children, each child would receive $9 divided by x. The expression is simply $9 / x, indicating the amount each child receives when divided equally.
Step-by-step explanation:
To find out how much each child would receive, you would divide the total amount of money by the number of children. The expression for this is: Amount per child = $9 / x. This expression represents the share each child gets when the total winnings are distributed equally among all the children. This formula ensures a fair distribution, as each child's share is calculated by dividing the total amount by the total number of children. The variable x represents the number of children, and as this number changes, the amount per child will adjust accordingly, maintaining an equitable distribution.