To represent the total cost for the car wash, we can break it down into two parts: the one-time fee for supplies and the charge per car wash.
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Charge for car washes: Since Liam charges $14 per car wash and the variable \( w \) represents the number of car washes purchased, the amount charged for the car washes is \( 14w \).
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One-time fee: There is a one-time fee of $5 for supplies.
Therefore, the total cost (C) for \( w \) car washes can be expressed as: \[ C = 14w + 5 \]
For the expression with the correct numbers:
- Filling in the first response area with \( w + w + 5 \) is incorrect. The correct representation is \( 14w + 5 \).
For the total cost for 10 washes:
- Substitute \( w = 10 \) into the expression: \[ C = 14(10) + 5 = 140 + 5 = 145 \]
So, the completed responses would be:
- The expression is: \( 14w + 5 \)
- The total cost for 10 washes is: $145.