Question

How do you evaluate the function `f(x)=3/5x+4` for `f(5))`?

Answer 1

`7`

Explanation:

`f(5)` just means `x=5`. So wherever we see an `x`, replace it with a `5`. Doing this, we get:

`f(5)=3/5(5)+4`

`f(5)=3/cancel5cancel(5)+4`

The 5s cancel out, and we're left with

`3+4`, which is obviously `7`.

Hope this helps!