Answer:
f(x)=15 d.
Step-by-step explanation:
To begin solving the equation you need to substitute -5 in for x.
The equation would then read f(x)=5(-5)+40
Then you need to simplify 5 times -5 is -25
the equation would be f(x)=-25+40
Then you would simplify and you will get f(x)=15
