Question

what is f(3) for the function f(x)=4x+5?

Answer 1

To find f(3), we need to replace x by 3 on f(x) as:

f(x) = 4x + 5

f(3) = 4*3 + 5

f(3) = 12 + 5

f(3) = 17

Therefore, f(3) is 17

Answer: f(3) = 17