Question

If f(x) = 1/3x − 2 and g(x) = −2x − 1, find (f • g)(9)

19

−18

0

−19

Answer 1

what's g(9)?

Answer 2

thats what I'm supposed to find I think

Answer 3

its the function

Answer 4

no you are supposed to find f(g(9)) ~ so we start with g(9)

substitute x = 9 for function g(x) first

Answer 5

ok

Answer 6

i got -19

Answer 7

tell me what you get :D

*next step*
after you get g(9), put the new value for x in f(x)

Answer 8

-19

Answer 9

yup now x = -19 for f(x)

Answer 10

okay so I got the right answer

Answer 11

can you help me with some more ?

Answer 12

ok o.o

Answer 13

If f(x) = 3x − 2 and g(x) = 2x − 1, find (f − g)(2).

7

1

−7

−1

Answer 14

(f - g) (x) = 3x - 2 - (2x - 1) = 3x - 2 - 2x + 1
Substitute x = 2

Answer 15

I got 1 is that correct

Answer 16

3x - 2 - 2x + 1 = x - 1 = 2 - 1 = 1
yea.

by the way i think i gave you the wrong explaination for the first one ._.
but if you get -19, you are right lol

Answer 17

If f(x) = 1/3x − 2 and g(x) = −2x − 1, find (f • g)(9)

suppose to be (1/3 x - 2)(-2x-1) = -1/3 (x - 6)(2x + 1)

-1/3 (9 - 6)(18 + 1) = - 19

Answer 18

haha okay thanks

Answer 19

If f(x) = 3x + 1 and g(x) = 2x − 4, find f[g(2)].

25

4

0

1

Answer 20

g(2) first then f(g(2)) :x

2(2) - 4 = ?

then 3(?) + 1

Answer 21

I got 0 for 2(2)-4

Answer 22

yup then 3(0) + 1

Answer 23

okay so the answer would be 1

Answer 24

If f(x) = −3x − 3 and g(x) = 2x + 1, find f/g (−2).

−3

3

−1

1

Answer 25

hmm
\[\frac{-3x-3}{2x+1}\]then sub x = -2

Answer 26

i got 3 for -3(-2)-3

Answer 27

and -3 for 2(-2)+1

Answer 28

then 3/(-3)~

Answer 29

so the answer would be -1 right

Answer 30

If f(x) = 1/2x + 2 and g(x) = −3x − 1, find g[f(4)].

−19

11

−13

−11

Answer 31

find f(4) then g(f(4))

Answer 32

I got -13 is that correct

Answer 33

yup

Answer 34

If f(x) = 2x + 1 and g(x) = −2x − 3, find (f + g)(−1).

2

4

−2

−8

Answer 35

2x + 1 - 2x - 3

x = -1

Answer 36

I got -2 thats correct

Answer 37

yup, gotta brb

Answer 38

ok thanks for help though

Answer 39

I appreciate it

Answer 40

i demand medals D: