Question

F(x)=3x-7 find f(2x+5)

Answer 1

f(2x+5)=6x+8

Step-by-step explanation:

Given the function f(x) defined below:

`f(x)=3x-7`

We are required to evaluate f(2x+5).

To do this, we substitute x in f(x) with 2x+5.

`\begin{gathered} f(x)=3x-7 \\ f(2x+5)=3(2x+5)-7 \end{gathered}`

We can then simplify:

`\begin{gathered} f(2x+5)=6x+15-7 \\ =6x+8 \end{gathered}`