Question

given f(x) = -5x - 15, find f(4).

Explanation:

Step1: Substitute x = 4 into f(x)

We have the function \( f(x)=-5x - 15 \). To find \( f(4) \), we substitute \( x = 4 \) into the function. So we get \( f(4)=-5\times4 - 15 \).

Step2: Calculate the value

First, calculate \( -5\times4=-20 \). Then, substitute this result back into the expression: \( f(4)=-20 - 15 \). Now, calculate \( -20-15=-35 \).

Answer:

\( -35 \)