52-4 OC. There is no solution. 7-7z There are (Type whole numbers.) z), where 2 is any 3. A theater charges $10 for main-floor seats and $4 for balcony seats. If all seats are sold, the ticket income is $4000. At one show, 40% of the main-floor seats and 50% of the balcony seats were sold and ticket income was $1800. How many seats are on the main floor and how many are in the balcony? 10x+4y=4000 1800 • 4x + 5y= seats on the main-floor and seats in the balcony. 200 500

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**Educational Website Content**

### Solving Systems of Equations Using the Gauss-Jordan Method

#### Example Problem:

5. Solve the following system using the Gauss-Jordan method:

\[
\begin{align*}
5x + 5y - 5z &= 40 \\
2x - y + 5z &= 6 \\
-x - 4y + 3z &= -38 \\
\end{align*}
\]

**Select the correct choice from the options below:**

- **A.** There is one solution.
  - The solution is \((x, y, z) = (1, 10, 1)\)
  - (Type in exact numbers in simplified form)

- **B.** There are infinitely many solutions.
  - The solutions are \((x, y, z)\) where \(z\) is any real number.

- **C.** There is no solution.

#### Word Problem Example:

**3. Theater Seating Problem:**

A theater charges $10 for main-floor seats and $5 for balcony seats. If all seats are sold, the ticket income is $4000. At one show, 40% of the main-floor seats and 50% of the balcony seats were sold and ticket income was $1800. How many seats are on the main floor and how many are in the balcony?

**Solution:**

- Use the equations:

  \[
  \begin{align*}
  10x + 5y &= 4000 \quad \text{(all seats sold)} \\
  4x + 2.5y &= 1800 \quad \text{(partial seats sold)}
  \end{align*}
  \]

- Solving these, you find:

  - **Seats on the main floor:** 200
  - **Seats in the balcony:** 400

**Transcribed Calculations:**

- Gaussian elimination steps are shown leading to the solution \((x, y, z) = (1, 7, 2)\) for a different set of equations.

---

This example illustrates how algebraic methods can solve real-world problems efficiently.
Transcribed Image Text:**Educational Website Content** ### Solving Systems of Equations Using the Gauss-Jordan Method #### Example Problem: 5. Solve the following system using the Gauss-Jordan method: \[ \begin{align*} 5x + 5y - 5z &= 40 \\ 2x - y + 5z &= 6 \\ -x - 4y + 3z &= -38 \\ \end{align*} \] **Select the correct choice from the options below:** - **A.** There is one solution. - The solution is \((x, y, z) = (1, 10, 1)\) - (Type in exact numbers in simplified form) - **B.** There are infinitely many solutions. - The solutions are \((x, y, z)\) where \(z\) is any real number. - **C.** There is no solution. #### Word Problem Example: **3. Theater Seating Problem:** A theater charges $10 for main-floor seats and $5 for balcony seats. If all seats are sold, the ticket income is $4000. At one show, 40% of the main-floor seats and 50% of the balcony seats were sold and ticket income was $1800. How many seats are on the main floor and how many are in the balcony? **Solution:** - Use the equations: \[ \begin{align*} 10x + 5y &= 4000 \quad \text{(all seats sold)} \\ 4x + 2.5y &= 1800 \quad \text{(partial seats sold)} \end{align*} \] - Solving these, you find: - **Seats on the main floor:** 200 - **Seats in the balcony:** 400 **Transcribed Calculations:** - Gaussian elimination steps are shown leading to the solution \((x, y, z) = (1, 7, 2)\) for a different set of equations. --- This example illustrates how algebraic methods can solve real-world problems efficiently.
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