Question

FAN AND MEDAL WILL BE AWARDED <3
Tf kind of questions are these ? Someone do it for me and I will give you a medal <3

Answer 1

why don't you write a rule for a function:

f(x) = do something to x

Answer 2

I'm just confused with the entire concept . I wouldn't know where to begin , honestly . Algebra is not for me .

Answer 3

do you know the equation for a line ?

Answer 4

I believe it's y = mx + b .. ?

Answer 5

no its ax+by+c=0

Answer 6

Oh ..

Answer 7

is it question/

Answer 8

@ivettef365 please helppp :((

Answer 9

** I believe it's y = mx + b ***

that is fine

now pick some nice numbers for m and b
and instead of y, write f(x)

you will now have a function

Answer 10

How is --- f(x) = 8x + 3

Answer 11

yes. they want your function to have at least two operations. You have
8 times x and plus 3

so that is ok

Answer 12

can you do question (4) ?

what is f(3) ?

to find f(3), replace x with 3 in your function, and simplify... do the arithmetic
can you do that ?

Answer 13

What was I supposed to put for question 3 again ? And yes I will simplify that

Answer 14

to repeat
to convince someone it is a function, you want
each input is related to exactly one output

you can say this is a line, and for every x there is exactly one y value
so it is a function

Answer 15

u want ansurs!! @LaynaMae

Answer 16

Huh ? ^ and okay @phi

Answer 17

uri is preetha??? lulwut u switched souls?

Answer 18

@Phi , I got -3 as the asnwer

Answer 19

you start with
f(x) = 8x + 3

they want f(3)
that means replace x with 3....look for all the x's, erase them, and put a 3 in their place

what do you get ?

Answer 20

Uhh , well when I worked it out I got -3 .. Is that not the correct answer ? :o

Answer 21

don't do anything tricky

just do this

replace x with 3....look for all the x's, erase them, and put a 3 in their place

in
f(x)= 8x+3

Answer 22

Wouldn't that be ---- f(3)= 8(3) + 3

Answer 23

yes. now use order of operations: multiply first, then add
what is 8 times 3 ?
then add another 3

Answer 24

24 + 3 = 27

Answer 25

so for
f(x)= 8x+3
you found
f(3) = 27

Answer 26

Correct

Answer 27

that is question (4)

Answer 28

Okay , give me a few minutes to type it all in my word document.

Answer 29

For (5)
see http://www.purplemath.com/modules/invrsfcn3.htm

Answer 30

I'm still not understanding :( Can you work through it with me ?

Answer 31

I got it , but now I need help on the last question !! @amistre64 @Preetha ?

Answer 32

@ganeshie8 ?

Answer 33

@Luigi0210 ?

Answer 34

I just need help on the last question D:

Answer 35

what are your f(x) and its inverse (im assuming thats the g(x))

Answer 36

this is what @phi helped me get ---- f(x) = 27 and the inverse i got was y-3/2

Answer 37

i think you might be confusing f, composed of 3; with your f, composed of x

Answer 38

I'm sure .. I've been confused from the beginning lol

Answer 39

Ohh , f(x) is 3 lol

Answer 40

f(x) = some equation in terms of x

f(3) = 27 is a solution when x=3

Answer 41

I remember now lol

Answer 42

what is your f, composed of x ? f(x) = ??

Answer 43

from the previous posts it looks like:

f(x)= 8x+3

Answer 44

Yes , that's it

Answer 45

then your inverse is off, prolly a typo

g(x) = (x-3)/8

Answer 46

now the last question is asking:

does f, composed of g; equal the same thing as g, composed of f?

since f, composed of x is: 8x + 3
then f, composed of g is: 8g + 3
and g = (x-3)/8 giving us: 8(x-3)/8 + 3

and

since g, composed of x is: (x-3)/8
then g, composed of f is: (f-3)/8
and f = 8x+3 giving us: ((8x+3)-3)/8

do they equal each other?

Answer 47

Hmm , yes they equal each other

Answer 48

then explain that to the martians ...

Answer 49

Okay , thank you

Answer 50

yw