Question

2 mark for review the function f is defined by f(x) = -3x + 60. what is the value of f(x) when x = -8? a 49 b 52 c 57 d 84

Explanation:

Step1: Substitute \( x = -8 \) into \( f(x) \)

We have the function \( f(x) = -3x + 60 \). Substitute \( x = -8 \) into the function: \( f(-8)=-3\times(-8)+60 \).

Step2: Calculate the multiplication

First, calculate \( -3\times(-8) \). Multiplying two negative numbers gives a positive result, so \( -3\times(-8)=24 \).

Step3: Calculate the addition

Now, add 60 to the result: \( 24 + 60 = 84 \).

Answer:

D. 84