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Answer:
f(9) = 0
Step-by-step explanation:
f(x) = -22 + x + 13
To find f(9) put 9 instead of x to the function like this.
f(x) = -22 + x + 13
f(9) = -22 + 9 + 13
f(9) = -13+13
f(9) = 0
Hope this helps you.
Let me know if you any other question :-)