if $f(x)=5x + 40$, what is $f(x)$ when $x=-5$?\n-9\n-8\n7\n15

if $f(x)=5x + 40$, what is $f(x)$ when $x=-5$?\n-9\n-8\n7\n15

if $f(x)=5x + 40$, what is $f(x)$ when $x=-5$?\n-9\n-8\n7\n15

Answer

Explanation:

Step1: Substitute x value

Substitute (x = - 5) into (f(x)=5x + 40), we get (f(-5)=5\times(-5)+40).

Step2: Calculate the result

First, calculate (5\times(-5)=-25). Then, (-25 + 40=15).

Answer:

D. 15