Question

Function Help, 2 more questions

Answer 1

Let f(x) = x + 8 and g(x) = x2 - 6x - 7. Find f(g(2)).

-7

-3

10

33

Answer 2

f(x)= 12 g(x) =-15
-3

I tried but I dont know if its right

Answer 3

first plug in 2 instead of x in the formula for g(x) and work it out
then plug in the value you found into f(x)

Answer 4

-15 is right for g(2)

Answer 5

so know you have -15 + 8

Answer 6

Ok
x2 - 6x - 7
4 - 12 -7 = -15

x+8
-15 +8=
-7?

Answer 7

f(g(2)) means the value of f(x) where g(2) replaces the x (in f(x))

Answer 8

-7 is correct

Answer 9

thanks, that wasn't too hard :p

Answer 10

can i post my last question here or make new thread?

Answer 11

yw
no - once you understand the notation its easy

Answer 12

post it

Answer 13

Let f(x) = -4x + 7 and g(x) = 10x - 6. Find f(g(x)).

-40x + 24

-40x + 31

-40x + 64

-40x + 70

Answer 14

here you replace the x in f(x) with 10x - 6 and simplify

Answer 15

I'll start it off:-

= -4(10x - 6) + 7

Answer 16

(-40x + 24) + 7

Answer 17

ok now you can simplify further

Answer 18

(-40x + 24) + 7
-7 -7
-40x + 17?

(-40x + 24) +7
-24 -24
-40x - 17?

Answer 19

I don't know which one

Answer 20

there was no need to write in the brackets after you did the multiplication

it is just

-40x + 24 + 7

= -40x + 31

Answer 21

or is it +7 to 24 to get -40x + 31

Answer 22

yes

Answer 23

didn't think first answer sounded right when i did it, thanks again

Answer 24

after you distribute the -4 over the brackets , the brackets disappear

Answer 25

okay.
Let f(x) = twenty-four over the quantity of 3 x minus two. Find f(-2).

-6

-3 <--?

3

6

is this one right since you're here

Answer 26

is it