Question

Let f(x) = -2x - 7 and g(x) = -4x + 3. Find (f o g)(-5) someone help

Answer 1

I am going to type a phrase that explains the concept, and when I do the problem, tell me if you get the phrase.
The phrase: "To find FoG, you plug what the g(x) is equal to, into the f(x), instead of x.

\(\large\color{midnightblue}{f(x) = -2x - 7 \color{red}{ } }\)
\(\large\color{midnightblue}{ g(x) = \color{red}{-4x + 3} }\)

\(\large\color{midnightblue}{f~o~g~= -2(\color{red}{-4x + 3}) - 7 \color{red}{ } }\)
\(\large\color{midnightblue}{f~o~g~= 8x-6 - 7 \color{red}{ } }\)
\(\large\color{midnightblue}{f~o~g~= 8x-13 \color{red}{ } }\)

for fog of -5, plug in -5 instead of x, into the fog (that we have just found).

Answer 2

ok

Answer 3

can u help with this problem