Evaluate ƒ(x) = –4x – 5 for x = –1.?

A. -9

B. 4

C. 1

D. -1

pls help

1 Answer
Mar 14, 2018

Answer:

See a solution process below:

Explanation:

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