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Use the following function rule to find f(4)f(4).\newlinef(x)=10−xf(x) = 10 - \sqrt{x}\newlinef(4)=f(4) = _____

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Full solution

Q. Use the following function rule to find f(4)f(4).\newlinef(x)=10−xf(x) = 10 - \sqrt{x}\newlinef(4)=f(4) = _____
  1. Identify function & input: Identify the function and the input value.\newlineWe are given the function f(x)=10−xf(x) = 10 - \sqrt{x} and we need to find the value of f(4)f(4).
  2. Substitute input into function: Substitute the input value into the function.\newlineTo find f(4)f(4), we substitute xx with 44 in the function f(x)f(x).\newlinef(4)=10−4f(4) = 10 - \sqrt{4}
  3. Calculate square root: Calculate the square root of the input value.\newlineThe square root of 44 is 22.\newline4=2\sqrt{4} = 2
  4. Complete the calculation: Complete the calculation.\newlineNow we subtract the square root of 44 from 1010.\newlinef(4)=10−2f(4) = 10 - 2\newlinef(4)=8f(4) = 8

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