Answer:
y = 21
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Explanation:
Step 1: Define
Identify
y = -4x + 9
x = -3
Step 2: Evaluate
- Substitute in x [Equation]: y = -4(-3) + 9
- Multiply: y = 12 + 9
- Add: y = 21