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To solve this problem, let’s start by analyzing the requirements:

1. Camacho is buying a truck priced at \( x \) dollars.
2. There is a 13% tax on this price.

To find the total amount Camacho will pay, we need to calculate the price plus 13% of that price. This can be set up as follows:

### Step 1: Determine the 13% Tax Amount
The 13% tax on the truck price \( x \) is:
\[
0.13 \times x = 0.13x
\]

### Step 2: Add the Tax to the Original Price
The total cost (price of the truck + tax) will be:
\[
x + 0.13x = (1 + 0.13)x = 1.13x
\]

### Step 3: Match with the Given Options
Now, we match our result, \( 1.13x \), with the provided options:

- **Option A**: \( (1 + 0.13)x \) — This matches our setup, so **A** is correct.
- **Option B**: \( \frac{13}{100} x \) — This only represents the tax portion, not the total price.
- **Option C**: \( 13x \) — This is incorrect as it implies 1300% tax.
- **Option D**: \( 1.13x \) — This matches our final answer, so **D** is also correct.
- **Option E**: \( 13x + x \) — This would also represent 1300% tax, so it is incorrect.

### Final Answer
The correct answers are:
- **A**: \( (1 + 0.13)x \)
- **D**: \( 1.13x \)

Would you like a deeper explanation, or do you have any questions?

### Related Questions:
1. What would the total cost be if the tax rate were 15% instead of 13%?
2. How would you calculate the total price if the tax is applied in two steps, e.g., 5% and then 8%?
3. If Camacho had a discount on the truck price before the tax was applied, how would that affect the total?
4. How does compounding taxes (applying multiple taxes consecutively) affect the final cost?
5. What is the formula for calculating total cost if \( n \)% tax is applied?

#### Tip
When working with percentages in word problems, always convert the percentage to a decimal (e.g., 13% becomes 0.13) before multiplying to find a tax or discount amount.

Camacho is buying a monster truck. The price of the truck is x dollars, and he also has to pay a 13% monster truck tax. Which of the following expressions could represent how much Camacho pays in total for the truck? Choose 2 answers: 
A: (1 + 0.13)x
B: (13/100)x
C: 13x
D: 1.13x
E: 13x + x

Learn how to calculate the total cost of a purchase with an additional tax percentage. This problem involves finding the total payment for a monster truck priced at x dollars with a 13% tax, exploring algebraic expressions and percentage calculations. Suitable for Grades 6-8 students.

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