I WILL GIVE BRAINLIEST HELPP PLS

a = 12

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition 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

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

12
bc math is math lol