anonymous
  • anonymous
Given f(x) = (3x-1)/2 Solve for f^1 (4)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@jim_thompson5910 @Hero @phi @zepdrix @.Sam. @timo86m @jdoe0001
zepdrix
  • zepdrix
\[\Large f(x)=\frac{3x-1}{2}\] Solve for `f^1(4)` Did you mean to write \(\Large f^{-1}(4)\) ?
anonymous
  • anonymous
No, its: \[f ^{1} (4)\]

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zepdrix
  • zepdrix
What is the 1 suppose to signify? Is that a first derivative? :o
anonymous
  • anonymous
I have no idea, that was the question I was given.
zepdrix
  • zepdrix
Hmm, weird. :(
anonymous
  • anonymous
The answer choices are: a. 1 b. 3 c. 5 d. 7
Ness9630
  • Ness9630
What class are you in?
anonymous
  • anonymous
Algebra 2
Ness9630
  • Ness9630
Well it can't mean derivative, that's for sure.
anonymous
  • anonymous
So how do I solve this then?
Ness9630
  • Ness9630
@zepdrix I know you're smart.. any ideas?
zepdrix
  • zepdrix
I think it was a typo, I think it was supposed to be f^-1(-4). Was this from a book, or like something your teacher assigned? :o Have you learned about finding inverses yet troy?
Ness9630
  • Ness9630
Wait.. hold on! I think it was suppose to be f^-1 like zep says.. it gets you one of the answer choices you listed. Watch, try it: \[f(x)=\frac{3x-1}{2}\] \[x=\frac{3y-1}{2}\] Solve for y and you get this: \[2x=3y-1\] \[2x+1=3y\] Divide: \[\frac{2x+1}{3}=f^{-1}(4)\] Can you finish it?
anonymous
  • anonymous
I like just started this course, I haven't really learned much yet. It's mostly just review of Algebra 1 from a couple years ago, which I can't remember anyway.
Ness9630
  • Ness9630
Do you understand what I just did though?
anonymous
  • anonymous
No.. not really.
Ness9630
  • Ness9630
What I did first was switch y and x around, since that's what solving for an inverse is. Then I just solved for y again.
anonymous
  • anonymous
Ok, so how would I get to the answer?
Ness9630
  • Ness9630
You see that very last equation? f^-1(4) Just plug in 4 for x and you will get it.
anonymous
  • anonymous
So, 3?
Ness9630
  • Ness9630
Yup!
anonymous
  • anonymous
Thanks! I've got another for you, if you don't mind. On the graph of the equation 4x + 5y = 2, what is the value of the y-intercept?
Ness9630
  • Ness9630
The y-intercept is just when x=0
anonymous
  • anonymous
The choices are: a. -5 b. -4 c. 4 d. 5
Ness9630
  • Ness9630
That's strange.. it's not one of the choices
anonymous
  • anonymous
The answer is 4, you have to graph the equation and tell what number is on the y-intercept.
anonymous
  • anonymous
The next question is: Graph: tinyurl.com/mrr8dcb Find the average rate of change for the given function from x=1 to x=2.
Ness9630
  • Ness9630
I have no access to connexus
anonymous
  • anonymous
Sorry, one second
anonymous
  • anonymous
Ness9630
  • Ness9630
Just find the slope: (1, 3) (2, 6)
anonymous
  • anonymous
4 isn't and option.
anonymous
  • anonymous
a. -2 b. -1/2 c. 1/2 d. 2
Ness9630
  • Ness9630
Whoops, it's suppose to be (1, 3)(2, 5)
anonymous
  • anonymous
Oh, ok
anonymous
  • anonymous
So it's 2?
Ness9630
  • Ness9630
Yup! Unless I'm losing my skills
anonymous
  • anonymous
haha hopefully not! Ok, I got another one. (Use the table below to answer the question) Find the average rate of change for the given function from x=1 to x=3
1 Attachment
Ness9630
  • Ness9630
I think for that one you would find the slopes for each, then add and divide the slopes
anonymous
  • anonymous
Ok. Thanks for all your help!
Ness9630
  • Ness9630
Anytime!

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