If \( f(x) = 2x + 3 \), what is \( f(4) \)?

If \( f(x) = 2x + 3 \), what is \( f(4) \)?

• A. 9
• B. 10
• C. 11
• D. 12

Answer: (C)

To find \( f(4) \) for the function defined by \( f(x) = 2x + 3 \), you substitute \( x \) with 4 in the equation. Start by calculating: \[ f(4) = 2(4) + 3 \] First, multiply 2 by 4: \[ 2(4) = 8 \] Next, add 3 to the result: \[ 8 + 3 = 11 \] Thus, \( f(4) = 11 \). This means that the answer is indeed 11, as you have calculated correctly. The other options do not satisfy the equation when \( x \) is replaced with 4, confirming that the only correct evaluation of \( f(4) \) leads to the answer of 11.

To find ( f(4) ) for the function defined by ( f(x) = 2x + 3 ), you substitute ( x ) with 4 in the equation.

Start by calculating:

[

f(4) = 2(4) + 3

]

First, multiply 2 by 4:

[

2(4) = 8

]

Next, add 3 to the result:

[

8 + 3 = 11

]

Thus, ( f(4) = 11 ).

This means that the answer is indeed 11, as you have calculated correctly. The other options do not satisfy the equation when ( x ) is replaced with 4, confirming that the only correct evaluation of ( f(4) ) leads to the answer of 11.