Let's break down the calculations step-by-step:
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Calculate the cost of one person's ticket and popcorn:
- Ticket: $5
- Popcorn: $2
- Total per person: \(5 + 2 = 7\)
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Sandy and her three friends mean a total of 4 people:
- Total cost for 4 people: \(4 \times 7 = 28\)
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Now apply the coupon which takes half off the total price:
- Total after coupon: \(\frac{28}{2} = 14\)
Therefore, the amount Sandy will pay at the movies is $14.