Answer:
x = 32 yd
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS 
- Brackets 
 - Parenthesis 
 - Exponents 
 - Multiplication 
 - Division 
 - Addition 
 - Subtraction 
 
Trigonometry
[Right Triangles Only] Pythagorean Theorem: a² + b² = c² 
- a is a leg 
 - b is another leg 
 - c is the hypotenuse 
 
Explanation:
Step 1: Identify Variables
Leg a = x
Leg b = 24
Hypotenuse c = 40
Step 2: Solve for x
- Substitute in variables [Pythagorean Theorem]: x² + 24² = 40²
 - [Subtraction Property of Equality] Isolate x term: x² = 40² - 24²
 - Evaluate exponents: x² = 1600 - 576
 - Subtract: x² = 1024
 - [Equality Property] Isolate x: x = 32