Question

If f (x) =5x+40 what is f (x) when x =-5

Answer 1

F(x)= 15 because 5 times -5 is -25 and -25+40 is 15

Answer 2

Answer: 15

Step-by-step explanation:

Given function: $\text{f(x)}=5x+40$

To find $\text{f(x)}$  when x=-5, we need to substitute the value of x in the given function, then we get

$\text{f(-5)}=5(-5)+40$

Simplify:

$\Rightarrow\text{f(-5)}=-25+40=40-25$

$\Rightarrow\text{f(-5)}=15$

Therefore, when x=-5, then the value of f(x)=15.