Question

I WILL GIVE BRAINLIEST HELPP PLS

Answer 1

Answer:

a = 12

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right  

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtraction Property of Equality

Trigonometry

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

• a is a leg
• b is another leg
• c is the hypotenuse

Step-by-step explanation:

Step 1: Define

Identify variables

a = a

b = 9

c = 15

Step 2: Solve for a

1. Substitute in variables [Pythagorean Theorem]:                                            a² + 9² = 15²
2. Evaluate exponents:                                                                                         a² + 81 = 225
3. [Subtraction Property of Equality] Subtract 81 on both sides:                       a² = 144
4. [Equality Property] Square root both sides:                                                    a = 12