Question

if f(x) = -9x + 3, find f(-5)

Answer 1

Plug in -5 for x

f(-5) = -9(-5) + 3

Simplify

-9 x -5 = 45

45 + 3 = 48

f(-5) = 48

hope this helps

Answer 2

Put the value of x = -5 to the equation of the function:

$f(x)=-9x+3\to f(-5)=(-9)(-5)+3=45+3=48$

Answer: f(-5) = 48.