geekfromthefutur
  • geekfromthefutur
I need help with algebra ll hmwrk
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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geekfromthefutur
  • geekfromthefutur
|dw:1442715709951:dw|
Nnesha
  • Nnesha
okay what about it ?what's the statement ?
geekfromthefutur
  • geekfromthefutur
Find the inverse

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Nnesha
  • Nnesha
f(x) is same as y so replace f(x) with y \[\huge\rm\color{ReD}{ y}=\frac{ -12-2\color{blue}{x} }{ 3 }\] to find inverse(f^{-1}(x)) `switch x and y` \[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] now solve for y
geekfromthefutur
  • geekfromthefutur
im stuck lol
Nnesha
  • Nnesha
alright its okay what u got so fr
geekfromthefutur
  • geekfromthefutur
1 Attachment
geekfromthefutur
  • geekfromthefutur
Hows that lol
Nnesha
  • Nnesha
i have no idea what did you type into the calculator ??......
geekfromthefutur
  • geekfromthefutur
The problem you showed me
Nnesha
  • Nnesha
there isn't any radical in my comment not even exponent what are you talking about ? o.O
Nnesha
  • Nnesha
|dw:1442716563503:dw|\(\color{blue}{\text{Originally Posted by}}\) @Nnesha f(x) is same as y so replace f(x) with y \[\huge\rm\color{ReD}{ y}=\frac{ -12-2\color{blue}{x} }{ 3 }\] to find inverse(f^{-1}(x)) `switch x and y` \[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] now solve for y \(\color{blue}{\text{End of Quote}}\)
geekfromthefutur
  • geekfromthefutur
i put the x= one into wolf fram
Nnesha
  • Nnesha
do you know how to solve that equation for y ?
Nnesha
  • Nnesha
first we nee to get rid of the denominator at right side so multiply both sides by 3
geekfromthefutur
  • geekfromthefutur
substitute y for f(x) then solve x in terms of y then switch x and y and then replace the y with f^-1(x)
Nnesha
  • Nnesha
yes right so how would you solve x in terms of y ?
Nnesha
  • Nnesha
\[\huge\rm\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{ 3 }\] first multiply both sides by 3
geekfromthefutur
  • geekfromthefutur
ok so 3x-12 or
Nnesha
  • Nnesha
\[\huge\rm\color{green}{3}·\color{blue}{ x}=\frac{ -12-2\color{red}{y} }{\cancel{ 3} }·\color{green}{\cancel{3}}\] multiply both sides by 3 at right side 3 cancels out then u get \[\huge\rm 3x=-12-2y\] now move the -12 at left side how would you do that would add ,subtract,multiply or divide 12 both sides ?
geekfromthefutur
  • geekfromthefutur
multiply
Nnesha
  • Nnesha
hmm no it's `-12 -2y` -12 is subtracting with -2y so you should apply the opposite of `subtraction` which is addition so add 12 both sides
geekfromthefutur
  • geekfromthefutur
ok add negative 12 to both or positive
Nnesha
  • Nnesha
it's negative 12 at right side so what is opposite of negative ?
geekfromthefutur
  • geekfromthefutur
positive
Nnesha
  • Nnesha
yes so to cancel out -12 you should add
geekfromthefutur
  • geekfromthefutur
yea
Nnesha
  • Nnesha
|dw:1442717916498:dw| let me know what you get
Nnesha
  • Nnesha
DON"t add 3x and 12 it's not 15 okay! :=)
geekfromthefutur
  • geekfromthefutur
Ok
geekfromthefutur
  • geekfromthefutur
ok well 12 and 12 make 24
Nnesha
  • Nnesha
|dw:1442718071794:dw|
geekfromthefutur
  • geekfromthefutur
oh
geekfromthefutur
  • geekfromthefutur
0
Nnesha
  • Nnesha
to solve for y we need to move -12 and -2 to the left side so we should cancel out the 12
Nnesha
  • Nnesha
and you can't add 3x with -12 so that would stay the same |dw:1442718149403:dw|
Nnesha
  • Nnesha
now one and last step cancel out the -2 from right side how would you do that ?
geekfromthefutur
  • geekfromthefutur
{-3x-12}/{2}
Nnesha
  • Nnesha
it's -2 · y (multiplication) apply the opposite of multiplication
Nnesha
  • Nnesha
oh never mind good job!
Nnesha
  • Nnesha
\[y=\frac{ -3x-12 }{ 2 } =\] is same as \[y=\frac{ -3 x}{ 2 } -\frac{ 12 }{ 2 }\] you can divide 12/2
geekfromthefutur
  • geekfromthefutur
lol yea i just started school so we are now started doing these and i got a 2/26 on my review and
Nnesha
  • Nnesha
okay got 2 mints divide 12/2 = ?
geekfromthefutur
  • geekfromthefutur
oh 6
Nnesha
  • Nnesha
yes so \[y=\frac{ -3 x}{ 2 } -6\]
Nnesha
  • Nnesha
and let me tell you how to put that inot the calculator x=(-12-2y)/3 (PARENTHESES FOR SAFETY
geekfromthefutur
  • geekfromthefutur
oh ok ^-^

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