thebroski
Let f(x) = -4x + 7 and g(x) = 10x - 6, find f(g(x)).
-40x + 24
-40x + 31
-40x + 64
-40x + 70
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snowskimwake
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Do you know how to start it?
thebroski
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no
snowskimwake
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Alright g is on the inside, so you are going to put the function g, into the x of the function f
thebroski
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ok
snowskimwake
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Does that make sense? Are you able to do it now?
thebroski
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i dont even know what im looking at
snowskimwake
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haha alright here,
-4(10x-6) + 7
I put g(x) into f(x) now just solve
snowskimwake
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simplify not solve
thebroski
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how do i do that?
Jasmineflvs
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first analyze it the question is find f(g(x)) you already know that f(x) = -4x + 7 and g(x) = 10x - 6...but in the question there is no f(x) but there is just an f so what would you do to find f
snowskimwake
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simplify? just distribute the parenthesis
Jasmineflvs
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no not yet
snowskimwake
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yes you would, from what I said he would
snowskimwake
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I already went through putting the function g into the function f
Jasmineflvs
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you would take away the x from the equation so it would be f=-4+7
Jasmineflvs
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i think
thebroski
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;__; what do i do
snowskimwake
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no you would not
snowskimwake
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listen to me, you have f(x) = -4(10x-6) + 7
Jasmineflvs
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i'm sorry i'll try to find a link that can help you..kk..first what kind of problem is this
thebroski
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algebra
snowskimwake
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then you just simplify
f(x) = -4(10x-6) + 7
-40x + 24 + 7
Jasmineflvs
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i mean like equation....ect.
snowskimwake
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f(x) = -40x + 31, and that is your answer
snowskimwake
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so b
Jasmineflvs
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lets have two opinions first kk
snowskimwake
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No it is b I promise you
thebroski
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im going to cry
snowskimwake
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jasmineflvs I came up with one of the answers, you told him to eliminate the x which you DO NOT DO. I promise you it is b, I can show you again if you like
Jasmineflvs
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no lets get two opinions and dont cry
snowskimwake
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Why does he need two opinions? alright thebroski I want you to work it out yourself, start by putting g(x) into the x in f(x)
snowskimwake
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f(x) = -4x + 7 and g(x) = 10x - 6, so
g(x) goes into
f(x = -4(g(x) goes here) + 7
Jasmineflvs
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just a sec kkk i'll get it and if you were rigght ill give you a medal..kk
thebroski
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thats racists
Jasmineflvs
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???
Jasmineflvs
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how?? may i ask
thebroski
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.just a sec ((kkk))) i'll get it and if you were rigght ill give you a medal..kk
Jasmineflvs
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??? still dont understand why it is racist
thebroski
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Let f(x) = 2x + 2. Solve f-1(x) when x = 4.
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10
Jasmineflvs
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let me guess you got the answer
thebroski
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no im just terrible at math
snowskimwake
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f^-1(x) is an inverse equation
Jasmineflvs
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that's okay
snowskimwake
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you need to switch the spots of x and y in the equation given and the solve for y, make sense
snowskimwake
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?
Jasmineflvs
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sorry i can't help you on functions i am behind in Algebra...I'm in 10th grade and I'm still in Algebra 1...sorwie
thebroski
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im in 10th to but math is not my subject i dont understand any of it except 2+2 thats all i understand
Jasmineflvs
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lolz
Jasmineflvs
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i'm getting a friend to help you on this one
Jasmineflvs
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@sasogeek @Hero @jim_thompson5910 @cwrw238 plz help him
UsArmy3947
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ok got the answer
UsArmy3947
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here f(10x-6)=31-40x
thebroski
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wut
UsArmy3947
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thats the answer
thebroski
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oh right
UsArmy3947
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sorry sir if u want help be more nicer
thebroski
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what do you mean
thebroski
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.Let f(x) = 2x + 2. Solve f-1(x) when x = 4.
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10
sasogeek
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thebroski, if you're not going to put some effort into understanding the concept of the answer, no one can really help you. stop posting questions with multiple choice answers if you're not ready to learn
UsArmy3947
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dont say any thing without thinking this is a Moderator
thebroski
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i am trying to put effort into this its just that i have a problem with understanding things im just kinda slow.
thebroski
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btw i really dont care if ur the moderator it doesnt give you the right to ban someone because they need help with questions
sasogeek
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i'm not going to ban u for asking for help, in fact i'll help you if i can. it just doesnt seem like u really want the help though. sounds like u just want the answer cos it's quite a long thread and u still don't get it... reposting the question with the possible answers doesn't get u so far on this site. be patient, and try at least, to understand :)
thebroski
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ok
UsArmy3947
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ya i could also help u
thebroski
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UsArmy3947
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what?
thebroski
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it means thank you
UsArmy3947
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no problem ill be leaving now bye