Question

you might need: calculator\\(f(x) = \

$$\begin{cases}-x - 4 &, \\ x < 3 \\\\x^2 - 7 &, \\ 3 \\leq x \\leq 10 \\\\\\dfrac{120}{x} + 5 &, \\ x > 10 \\end{cases}$$

\\)\\(f(4) = \square\\)

Explanation:

Step1: Identify relevant function piece

Since $3 \leq 4 \leq 10$, use $f(x)=x^2-7$.

Step2: Substitute $x=4$ into the function

$f(4)=4^2 - 7$

Step3: Calculate the result

$f(4)=16 - 7 = 9$

Answer:

9