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To represent the situation of the student council wanting to order 9 shirts without spending more than $171, we can create the following inequality:
9T ≤ 171
where T represents the cost of one shirt. The inequality states that the cost of 9 shirts must be less than or equal to $171.
To explain the inequality further, if each shirt costs T dollars, then the total cost of 9 shirts would be 9T. The inequality 9T ≤ 171 ensures that the student council can order the 9 shirts without exceeding their budget of $171.