Evaluate ƒ(x) = –4x – 5 for x = –1.?

Question

A. -9

B. 4

C. 1

D. -1

pls help

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Answer 1 · 2018-03-14T01:45:40

See a solution process below:

For each occurrence of $color(red)(x)$ in $f(x)$ substitute $color(red)(-1)$ and calculate the result:

$f(color(red)(x)) = -4color(red)(x) - 5$ becomes:

$f(color(red)(-1)) = (-4 xx color(red)(-1)) - 5$

$f(color(red)(-1)) = 4 - 5$

$f(color(red)(-1)) = -1$

The correct answer is D