Q. Use the following function rule to find f(9).f(x)=x+12f(9)=_____
Identify function rule & input: Identify the function rule and the input value.We are given the function rule f(x)=x+12 and we need to find the value of f(9).
Substitute input into rule: Substitute the input value into the function rule.To find f(9), we substitute 9 for x in the function rule:f(9)=9+12
Calculate square root: Calculate the square root of the input value.The square root of 9 is 3, so we have:f(9)=3+12
Add to get final result: Add the square root to 12 to get the final result.f(9)=3+12=15