Answer:
-23
Step-by-step explanation:
f(-9) is -9 or -9f
Hi the answer is A, hopefully i helped you
Sum of 4 and 5 → 4 + 5 = 9
Difference of 40 and 4 → 40 – 4 = 36
One-third 1/3 of 36 → 12
→ 12 – 9
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A and D are the true number sentences