Question

5. Evaluate the function for the given variables.

(1 Point)
f (x) = 2x + 3 when x 5 and when x = -3.
a. f (5) = 16 and f (-3) = 0
b. f (5) = 17 and f(-3) = 9
c. f (5) = 13 and f (-3) = -3
d. f (5) = 5 and f (-3) = -3

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

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

General Formulas and Concepts:

Pre-Algebra

• Order of Operations: BPEMDAS

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