Answer:
[tex]\Huge \boxed{f(-5)=15}[/tex]
[tex]\rule[225]{225}{3}[/tex]
Step-by-step explanation:
[tex]\sf f(x)=5x+40[/tex]
The input value is -5.
Switching x with -5.
[tex]\sf f(-5)=5(-5)+40[/tex]
Solving for f(-5).
[tex]\sf f(-5)=-25+40[/tex]
[tex]\sf f(-5)=15[/tex]
[tex]\rule[225]{225}{3}[/tex]
