7. Modeling Real Life You buy the key chains shown. You pay with a $$ \$ 5 $$ bill. What is your change?

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Sure, I'd be happy to help you calculate your change! However, I'll need a bit more information to provide an accurate answer. Specifically, I need to know:

1. **The price of each key chain.**
2. **The number of key chains you're purchasing.**

### Here's a General Approach to Finding Your Change:

1. **Determine the Total Cost:**
   
   $$
   \text{Total Cost} = \text{Price per Key Chain} \times \text{Number of Key Chains}
   $$

2. **Calculate Your Change:**
   
   $$
   \text{Change} = \$5.00 - \text{Total Cost}
   $$

### **Example Scenario:**

Let's say each key chain costs **\$1.25**, and you decide to buy **3 key chains**.

1. **Calculate the Total Cost:**
   
   $$
   \text{Total Cost} = \$1.25 \times 3 = \$3.75
   $$

2. **Find Your Change:**
   
   $$
   \text{Change} = \$5.00 - \$3.75 = \$1.25
   $$

So, you would receive **\$1.25** in change.

### **Please Provide More Details:**

If you can provide the **price of each key chain** and **how many you're buying**, I can give you a precise calculation. Feel free to share those details!
To find your change, subtract the total cost of the key chains from \$5.00. You need to know the price per key chain and the number of key chains purchased to calculate the exact change.

7. Modeling Real Life You buy the key chains shown. You pay with a \( \$ 5 \) bill. What is your change?

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