Question

What is the value of f(12)-f(8) when f(x)=3x+9

Answer 1

Answer:

12

Step-by-step explanation:

f(x)=3x+9

f(12) = 3*12 +9

       36+9

        45

f(8) = 3*8+9

     =24+9

     = 33

f(12) - f(8) = 45-33

                    12