Pregunta
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4.3 The price of a coat after the discount is \( \$ 21 \). What was the original price? Show your work! The original price of the coat was \( \$ \)

Ask by Marsh Wells. in the United States
Jan 23,2025

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Cannot determine the original price with the given information.

Solución

To determine the **original price** of the coat before the discount, we need more information about the nature of the discount applied. Specifically, we need to know one of the following: 1. **Discount Percentage**: If the discount was a certain percentage off the original price. 2. **Discount Amount**: If a fixed dollar amount was subtracted from the original price. Since the problem statement only provides the **final price after the discount** (\$21) without specifying the **discount rate** or **amount**, we cannot calculate the original price with the given information. However, I can show you how to solve the problem in both scenarios once the missing information is provided. --- ### **Scenario 1: Discount Percentage is Known** **Example:** *Suppose the discount was **30%** off the original price.* **Let’s denote:** - \( P \) = Original price of the coat - Discount = 30% of \( P \) = \( 0.30P \) **After the discount, the price is \$21:** \[ P - 0.30P = 21 \] \[ 0.70P = 21 \] \[ P = \frac{21}{0.70} = 30 \] **So, the original price was \$30.** --- ### **Scenario 2: Discount Amount is Known** **Example:** *Suppose the discount was **\$5** off the original price.* **Let’s denote:** - \( P \) = Original price of the coat - Discount = \$5 **After the discount, the price is \$21:** \[ P - 5 = 21 \] \[ P = 21 + 5 = 26 \] **So, the original price was \$26.** --- **Please provide either the discount percentage or the discount amount** so that we can accurately determine the original price of the coat.

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To find the original price of the coat before the discount, we first need to know the discount rate. Let's assume the coat was discounted by a percentage, denoted as \( d \). The formula for the price after a discount can be given by: \[ \text{Price after discount} = \text{Original Price} \times (1 - \frac{d}{100}) \] If we let \( P \) be the original price, we have: \[ 21 = P \times (1 - \frac{d}{100}) \] If we rearrange the equation to solve for \( P \): \[ P = \frac{21}{(1 - \frac{d}{100})} \] Now you can plug in the actual discount percentage if you have it to find the original price of the coat! If the discount was, say, 30%, then it becomes: \[ P = \frac{21}{(1 - 0.3)} = \frac{21}{0.7} = 30 \] So in that case, the original price was \( \$30 \). Note that you can replace the 30% with any other discount rate to calculate different original prices!

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