Algebra-1

Question Analysis
This question tests the ability to write an expression based on a real-world scenario. Students need to determine the cost per dozen cupcakes and then use it to form the expression.

Key Concept Explanation
The key concept here is understanding how to form an expression from a given situation. The expression should represent the total cost in terms of the number of dozens .

Step-by-step Solution
1. Identify the given information: The total cost for 3 dozen cupcakes is $45.
2. Determine the cost per dozen: Divide the total cost by the number of dozens: .
3. The cost per dozen is $15.
4. Write the expression for the total cost

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