Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN: 9780134463216
Author: Robert F. Blitzer
Publisher: PEARSON
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A ladder leans stains  a wall so the base of the ladder is 5 feet from the wall. If the verticle height reached by the ladder along the wall is x feet and length of the ladder is 1 foot more than the vertical height,find the length of the ladder.

**Problem Description:**

A ladder leans against a wall so that the base of the ladder is 5 feet from the wall. If the vertical height reached by the ladder along the wall is x feet and the length of the ladder is 1 foot more than the vertical height, find the length of the ladder.

**Explanation and Steps:**

1. **Identify Known Values:**
   - Distance from the wall to the base of the ladder (Adj) = 5 feet.
   - Vertical height reached by the ladder (Opp) = x feet.
   - Length of the ladder (Hyp) = x + 1 feet.

2. **Apply the Pythagorean Theorem:**
   The Pythagorean Theorem states that in a right-angled triangle:
   \[
   \text{(Hypotenuse)}^2 = \text{(Opposite side)}^2 + \text{(Adjacent side)}^2
   \]

   Substitute the known values:
   \[
   (x + 1)^2 = x^2 + 5^2
   \]

3. **Simplify the Equation:**
   Expand and simplify the equation:
   \[
   x^2 + 2x + 1 = x^2 + 25
   \]

4. **Solve for x:**
   Subtract \(x^2\) from both sides of the equation:
   \[
   2x + 1 = 25
   \]
   \[
   2x = 24
   \]
   \[
   x = 12
   \]

5. **Find the Length of the Ladder:**
   The length of the ladder = \(x + 1\):
   \[
   x + 1 = 12 + 1 = 13
   \]

**Answer:**
The length of the ladder is 13 feet.
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Transcribed Image Text:**Problem Description:** A ladder leans against a wall so that the base of the ladder is 5 feet from the wall. If the vertical height reached by the ladder along the wall is x feet and the length of the ladder is 1 foot more than the vertical height, find the length of the ladder. **Explanation and Steps:** 1. **Identify Known Values:** - Distance from the wall to the base of the ladder (Adj) = 5 feet. - Vertical height reached by the ladder (Opp) = x feet. - Length of the ladder (Hyp) = x + 1 feet. 2. **Apply the Pythagorean Theorem:** The Pythagorean Theorem states that in a right-angled triangle: \[ \text{(Hypotenuse)}^2 = \text{(Opposite side)}^2 + \text{(Adjacent side)}^2 \] Substitute the known values: \[ (x + 1)^2 = x^2 + 5^2 \] 3. **Simplify the Equation:** Expand and simplify the equation: \[ x^2 + 2x + 1 = x^2 + 25 \] 4. **Solve for x:** Subtract \(x^2\) from both sides of the equation: \[ 2x + 1 = 25 \] \[ 2x = 24 \] \[ x = 12 \] 5. **Find the Length of the Ladder:** The length of the ladder = \(x + 1\): \[ x + 1 = 12 + 1 = 13 \] **Answer:** The length of the ladder is 13 feet.
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