Question

PLEASE HELP if f(x)=2x+6 and g(x)=-8x what is g((4))?
A)-448
B)-112
C)-58
D)-14

Answer 1

you mean what is \(g(f(4))\), right?

Answer 2

first, find \(f(4)\)

Answer 3

yes sorry

Answer 4

i have no idea how to do that or where to start

Answer 5

well, you start with f(4).

To find f(4), you just replace x in f(x) by 4.

for example: \(f(x) = 2x+6\quad\Longrightarrow\quad f(\color{red}4) = 2(\color{red}4)+6=\cdots~?\)

Answer 6

can you find what is f(4)?

Answer 7

is it d

Answer 8

no, ok you got \(f(4) = 14\), right?

So \(g(\color{red}{f(4)}) = g(\color{red}{14}) = -8(\color{red}{14})=\cdots~?\)

Answer 9

oh okay so it would be -112

Answer 10

Yes

Answer 11

thank you i get it now

Answer 12

no problem