Question

5. Evaluate the function for the given variables.

Answer 1

We evaluate Separately.

Let x = 5

f(5) = 2(5) + 3

f(5) = 10 + 3

f(5) = 13

Now let x = -3.

f(-3) = 2(-3) + 3

f(-3) = -6 + 3

f(-3) = -3

Answer: Choice C

Answer 2

Answer:

C. f(5) = 13 and f(-3) = -3

General Formulas and Concepts:

Pre-Algebra

• Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

f(x) = 2x + 3

x = 5

x = -3

Step 2: Evaluate

x = 5

1. Substitute:                    f(5) = 2(5) + 3
2. Multiply:                        f(5) = 10 + 3
3. Add:                              f(5) = 13

x = -3

1. Substitute:                    f(-3) = 2(-3) + 3
2. Multiply:                        f(-3) = -6 + 3
3. Add:                              f(-3) = -3