Answer :
Answer: [tex]f(-12)=-9[/tex]
Step-by-step explanation:
We have the following function:
[tex]f(x)=2x+15[/tex]
And we have to evaluate it when [tex]x=-12[/tex], this means we have to substitute [tex]x[/tex] by [tex]-12[/tex]:
[tex]f(-12)=2(-12)+15[/tex]
Solving:
[tex]f(-12)=-24+15[/tex]
Finally:
[tex]f(-12)=-9[/tex]