Question

evaluating functions - evaluate the function for the given values. no calculator. f(x) = -3(x + 7) f(-1) ??? only type the numeric answer

Explanation:

Step1: Substitute x = -1 into f(x)

We have the function \( f(x) = -3(x + 7) \). To find \( f(-1) \), we substitute \( x = -1 \) into the function. So we get \( f(-1) = -3((-1) + 7) \).

Step2: Simplify the expression inside the parentheses

First, calculate the value inside the parentheses: \( (-1) + 7 = 6 \). Now the function becomes \( f(-1) = -3 \times 6 \).

Step3: Multiply the numbers

Multiply -3 and 6: \( -3 \times 6 = -18 \).

Answer:

-18