Question

Given that f(x) = x^^2 − 4x − 3 and g(x) = the quantity of x plus three, over four , solve for f(g(x)) when x = 9.

−6

3

6

9

Answer 1

any ideas

Answer 2

it would help if you put the steps js

Answer 3

g(x) = the quantity of x plus three, over four ,
First try tol translate this into maths.

When you are done, find g(x) when x=9

You will get a numerical solution (something like g(x)=1)
Put this solution into:
f(x) = x^2 − 4x − 3
You are done!

Answer 4

the equation is f(x) = x^2 − 4x − 3

Answer 5

can you show me in steps

Answer 6

The steps are there, try to work it through

Answer 7

f(9) = (9)^2 - 4(9) - 3
f(9) = 81 -36 -3
f(9) =42
is this correct

Answer 8

i dont get how to do the g(x)

Answer 9

Do NOT jump steps.
Translate that English sentence into maths first!

Answer 10

g(x) = x+3/4

Answer 11

(x+3)/4

Answer 12

g(x) = x+3/4\[g(x) = \]

Answer 13

So what will be g(x) at x=9?

Answer 14

so i subsitute the 9 for the x

Answer 15

Yes

Answer 16

3

Answer 17

i got 3

Answer 18

thank you

Answer 19

So that is g(x) at x=9
What will be f(g(x)) at x=9?

Answer 20

the answer isnt 3

Answer 21

No :)

Answer 22

?

Answer 23

3 is g(x) at x=9

Answer 24

do i multiply the answer to f() and G(x)

Answer 25

f(g(x)) at x=9 is the question!
G(x)=3
So
f(g(x)) at x=9?
is f(3)

Answer 26

i dont get it

Answer 27

there are 2 functions f(x) and g(x)
f(g(x)) at x=9 is the question
f(g(x)) means you have x=9 and you first do function g than you get some result (3 in our case) and you carry on to do function f with your result.
f(g(x))=f(g(9))=f(3)=3^2-4*3-3=-6

Answer 28

the answer is -6 then

Answer 29

It seems you do not wish to understand just looking for an answer...
Yes it is -6