Answer:
f(-6) = 3
Step-by-step explanation:
Simply plug in -6 as x
f(-6) = -(-6) - 3
f(-6) = 6 - 3
f(-6) = 6 - 3 = 3
so f(-6) = 3
1). if x = -6 then f(x) looks like f(-6) = -x - 3
2).since -6 is a negative and so is -x it becomes a positive
f(-6) = 6 -3
3). subtract as usual
