Answer: 15
Step-by-step explanation:
Given function: [tex]\text{f(x)}=5x+40[/tex]
To find [tex]\text{f(x)}[/tex] when x=-5, we need to substitute the value of x in the given function, then we get
[tex]\text{f(-5)}=5(-5)+40[/tex]
Simplify:
[tex]\Rightarrow\text{f(-5)}=-25+40=40-25[/tex]
[tex]\Rightarrow\text{f(-5)}=15[/tex]
Therefore, when x=-5, then the value of f(x)=15.
