Answer:
12
Step-by-step explanation:
you just have to substitute -9 into -2x-6
-2(-9) - 6
18 - 6
=12
hope that helps
f(- 9) = 12
Substitute x = - 9 into f(x) , that is
f(- 9) = - 2(- 9) - 6 = 18 - 6 = 12
