Question

FLVS HELP PLEASE Help please !!!
Part 1. Using the two functions listed below, insert numbers in place of the letters a, b, c, and d so that f(x) and g(x) are inverses.

f(x)=
x+a
b

g(x)=cx−d

Part 2. Show your work to prove that the inverse of f(x) is g(x).

Part 3. Show your work to evaluate g(f(x)).

Part 4. Graph your two functions on a coordinate plane. Include a table of values for each function. Include 5 values for each function. Graph the line y = x on the same graph.

Answer 1

What unit is this?

Answer 2

its the 5.08 project -.-

Answer 3

have you done it before ?

Answer 4

I did this through connections, I remember doing it. I'll see if I still have the file so I can help you.

Answer 5

thank you !!! go in the gradebook tab

Answer 6

@Maria977 you there?

Answer 7

@helder_edwin

Answer 8

@PurplePunch

Answer 9

I couldn't find the file, as I took a multiple choice test on this. But I did manage to find the lesson.

Answer 10

But, do you have any idea on what you want a, b and c to be?

Answer 11

@Maria977 no i dont know anything about functions, my grade went down to a C just because of this section

Answer 12

(functions)

Answer 13

Okay, how about we do f(x) = 3x -5 ?

Answer 14

ok ... ? im going by what you say cuz i dont understand it anyway

Answer 15

but ok

Answer 16

@Maria977 are you typing still ?

Answer 17

well, to get g(x) you just find the inverse of f(x) like this:

f(x) = 3x -5
Now change f(x) for
y= 3x -5
Switch the x and y
x=3y -5
Now isolate the y by adding five to both sides
x + 5 =3y
Now divide both sides by 3
\[ \frac{ x +5 = 3y }{ 3 }\]\[y = \frac{ x +5 }{ 3 }\]

Answer 18

this is just part 1 right ?

Answer 19

For part one, you just write the functions, and then for part 2, you show the work that I showed to find the inverse.

Answer 20

So you basically gave me the full answer for all of task 1 ?

Answer 21

@Maria977

Answer 22

@Maria977 is that it...? can you help me with task 2 ?

Answer 23

do you know what composition of functions is?

Answer 24

It looks familiar but no, ive read the lesson twice and watched youtube videos and i just cannot understand it

Answer 25

so no..

Answer 26

Ok, so you question is asking for g(f(x)). I am not that sure on this, but I think it should be your f(x) function replaces the x part in your g(x) function.

Answer 27

I dont understand anything you're saying !!! ):

Answer 28

thats part 3 right

Answer 29

What I mean is \[g(f(x))= \frac{ (3x-5) +5 }{ 3 }\] I think it looks so difficult because of the f(x) function I chose

Answer 30

no its not what you chose, i just literally have never understood algebra, its my second time taking it. the equation you just put, is that the answer for part 3 ?

Answer 31

you see what I mean by replacing the x in g(x), right? I think we should try this with a different f(x) function, yes?

Answer 32

no i dont see because i dont understand and sure whatever you say, if you could just please tell me what is what part

Answer 33

ill try to understand but i most probably will not with more and more numbers and information just please help me with answers or equations

Answer 34

ill still try

Answer 35

the last part I showed you, g(f(x)) is part 3

Answer 36

so is this all i need to submit for task 1 ? Task 1
well, to get g(x) you just find the inverse of f(x) like this:

f(x) = 3x -5
Now change f(x) for
y= 3x -5
Switch the x and y
x=3y -5
Now isolate the y by adding five to both sides
x + 5 =3y
Now divide both sides by 3
x+5=3y / 3
y=x+5/ 3

g(f(x))=(3x-5)+5 /3

Answer 37

No, for part one submit

F(x) = 3x-5

(g(x) = \[\frac{ x+5 }{ 3 }\]

Answer 38

what about the y=x+5/3

Answer 39

what about all the steps you showed me before..

Answer 40

after you finish finding the inverse, you are supposed to replace the y with g(x). It is still the same function, but make sure you put g(x) instead of y

Answer 41

The steps are for part 2

Answer 42

wait so

Answer 43

F(x) = 3x-5
(g(x) =
x+5/3 is the answer for JUST part 1

Answer 44

yes

Answer 45

and then part 2 is
f(x) = 3x -5
Now change f(x) for
y= 3x -5
Switch the x and y
x=3y -5
Now isolate the y by adding five to both sides
x + 5 =3y
Now divide both sides by 3
x+5=3y / 3
y=x+5/ 3

Answer 46

yes, because part two ask you to prove how g(x) is the inverse of f(x), s you show the steps as proof

Answer 47

and part 3 ... ??

Answer 48

part 3 is the g(f(x)) function I showed you

Answer 49

which is ?

Answer 50

i got confused

Answer 51

look back towards the beginning of our conversation, and find the g(f(x)) function

Answer 52

did you find it ?
If not it is:

\[g(f(x))=\frac{ (3x-5)+5 }{ 3}\]

Answer 53

@Maria977 so that is part 3 ? isnt that part 1 ?

Answer 54

@Maria977 oh never mind, so thats it, i have all 3 parts ?

Answer 55

Yep, do you know how to get part four?

Answer 56

no because its a graph but i dont know how to graph it on a computer or how to type in a graph

Answer 57

okay, wait a sec.

Answer 58

ok

Answer 59

The blue is f(x) and the red is g(x) ok

Answer 60

so i attach this to the assingment ?

Answer 61

for part 4 ?

Answer 62

Yes, attach it as part of the assignment. Also, for part 3, make sure to include some evidence. For example, write that f(x) replaces the x in the function g(x) and also include the g(f(x)) function.

Answer 63

thank you so much!!! you saved me

Answer 64

@Maria977