Given. f(x)=2x-1, g(x)=5-2x

Is there a question?

judging from the student's alleged name, we want something like

(f◦g)(x) = f(g) = 2g-1 = 2(5-2x)-1 = ...

To find the value of f(3), we need to substitute x=3 into the expression for f(x) and evaluate it.

The expression for f(x) is given as f(x) = 2x - 1.

So, to find f(3), we substitute x=3 into the expression:

f(3) = 2(3) - 1

Now, we perform the computation:

f(3) = 6 - 1 = 5

Therefore, f(3) = 5.