Question

Question 4

Given f (20) = 5, find x if f(x) = -3x – 4
-3
-19
O 11
O 12
help

Answer 1

-19

Explanation:

`f(x) = 5 , f(x) = -3x-4`

We just have to plug in 5 into f(x) and solve for y

`f(5) = -3(5) - 4 \\f(5) = -15 - 4 \\f(5) = -19`