If fx = 5x + 40, what is fx when x = 5?

To find the value of fx when x is 5, we simply need to substitute 5 into the equation fx = 5x + 40.

So, we calculate:

fx = 5(5) + 40

This simplifies to:

fx = 25 + 40

Therefore:

fx = 65

In conclusion, when x = 5, fx equals 65.