Question

If f:X is 3x + b and ff(2) = 12, find the value of b​

Answer 1

Answer:

$b =6$

Step-by-step explanation:

Given

$f(x) =3x + b$

$f(2) = 12$

Required

Find b

$f(2) = 12$ implies that:

$12 = 3 * 2 + b$

$12 = 6 + b$

Collect like terms

$b = 12 - 6$

$b =6$