To find the cost of one ticket to the concert, we can follow these steps:
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Calculate the number of people: Kirsten and her three friends make a total of 4 people.
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Calculate the total insurance cost: Since the insurance cost is $15 for each person, the total insurance cost for 4 people is: \[ 4 \text{ people} \times 15 \text{ dollars/person} = 60 \text{ dollars} \]
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Calculate the total cost of the tickets: The total cost for tickets includes the total amount paid for tickets and the insurance. Therefore, the total cost for the tickets alone is: \[ 530 \text{ dollars (total)} - 60 \text{ dollars (insurance)} = 470 \text{ dollars} \]
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Calculate the cost per ticket: The total cost of the tickets is $470, and this is for 4 tickets (one for each person). Therefore, the cost per ticket is: \[ \frac{470 \text{ dollars}}{4 \text{ tickets}} = 117.5 \text{ dollars/ticket} \]
Thus, the cost of one ticket to the concert is $117.50.