Question

Evaluate k(4) for the function k(x)=18−2x

Answer 1

k(4) = 10

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

Algebra I

• Function Notation

Explanation:

Step 1: Define

k(x) = 18 - 2x

k(4) is x = 4

Step 2: Evaluate

1. Substitute in x: k(4) = 18 - 2(4)
2. Multiply: k(4) = 18 - 8
3. Subtract: k(4) = 10