Final answer:
The variable expression for the total amount spent on 5 shirts each at the same price is 5x. If each shirt costs $15, then the total cost is 5 multiplied by $15, which equals $75.
Step-by-step explanation:
The problem involves purchasing 5 shirts that each have the same price. To express the total amount spent on the shirts using a variable, let's use x to represent the price of one shirt. Therefore, the variable expression for the total amount spent is 5x, since you would multiply the price of one shirt by the number of shirts (5).
When each shirt costs $15, you substitute 15 for x in the expression to calculate the total cost: 5(15) = $75. So, the total money spent is $75, which corresponds to option A. 5x; $75.