anonymous
  • anonymous
Will Fan and Medal!!! Just need someone to check these for me!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
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anonymous
  • anonymous
@Nnesha @pooja195 @ganeshie8 can any of you help me please
whpalmer4
  • whpalmer4
No, the first one is not correct, didn't check the rest.

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anonymous
  • anonymous
ok then would the first one be a?
whpalmer4
  • whpalmer4
One check you can do yourself for checking inverse functions is to plot a few points of the original function and a few of the inverse. The inverse function will be an exact replica of the original reflected across the line \(y = x\) (just a line extending up and to the right at a \(45^\circ\) angle). I have plotted your answer here so you can see that it is not correct:
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whpalmer4
  • whpalmer4
Here's what it would look like if correct:
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whpalmer4
  • whpalmer4
No, (a) is not correct either. Can you show me how you are doing this?
anonymous
  • anonymous
ok what did u use to get that? that can help me
anonymous
  • anonymous
my teacher just told us that you would need to make everything opposite?
whpalmer4
  • whpalmer4
Oh, it's an expensive program called Mathematica. There are undoubtedly many cheaper or free options, this just happens to be the one I have at hand. You could also use graph paper and pencil :-) Uh, that's probably not exactly how they put it... Let's say you want to find the inverse of \[f(x)=3x+2\]First, replace \(f(x)\) with \(y\): \[y = 3x+2\]now switch the two variables. anywhere you see \(y\), you put \(x\) and vice versa. \[x = 3y+2\] now solve that for \(y\) and you have your inverse function \[x-2=3y\]\[y = \frac{x-2}{3}\]
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anonymous
  • anonymous
soo i dont really know what to do she not a very good teacher
anonymous
  • anonymous
wow ok i understand now thanks can u check the rest imma try to solve it real quick
whpalmer4
  • whpalmer4
ok, I'll the check the others and you do that one
anonymous
  • anonymous
would it be umm d?
anonymous
  • anonymous
1+x/4=y is what i got but it can also be the same thing as d right?
anonymous
  • anonymous
|dw:1443542618922:dw|
whpalmer4
  • whpalmer4
ah, yes, that's better. you need to write that as \[(1+x)/4 = y\]if you are going to write it all on one line like that
whpalmer4
  • whpalmer4
by the rules of operator precedence, \[1+x/4 = y\] is the same as\[1 + \frac{x}{4} = y\]
whpalmer4
  • whpalmer4
So yes, (d) is the correct answer for the first part. Unfortunately, you probably realize that you did 2 of the others incorrectly...but got the 3rd one right.
whpalmer4
  • whpalmer4
(to be clear, 3rd one is referring to Question #3)
anonymous
  • anonymous
yeah i realized that can i solve them and u check them for me real quick? yeah i know what u meant
anonymous
  • anonymous
#1. D #2. idk how to do that one? #3. D #4. C Are they correct now and can you help me on question 2?
anonymous
  • anonymous
@whpalmer4
whpalmer4
  • whpalmer4
Ok, for 2, we have to first find the inverse function, then evaluate it at \(x=9\) What is the inverse function of \(y = 6x-3\)
whpalmer4
  • whpalmer4
sorry, I looked too quickly at your answer for #3, that's not correct...but we'll work through it and get the right one.
whpalmer4
  • whpalmer4
@Zbratz7 you home?

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