Question

What is the value of f(7) for the function f(x) = 2x - 5?

Answer 1

just plug in what x is in f(x) which is given f(7) into the equation.
f(x) = 2x - 5

f(7) = 2(7) - 5

f(7) = 14 - 5

f(7) = 9

hope this helps, God bless!