kaylaprincess
  • kaylaprincess
Please help! I have an exam at nine and I don't understand how to solve this..
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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kaylaprincess
  • kaylaprincess
This is off my study guide. The question asks which of the expressions are correct. I see the answer but I don't know how they got it... I need step by step process to see!!
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kaylaprincess
  • kaylaprincess
@Nnesha @Jaynator495 @Abhisar @ganeshie8 i have an exam soom, can you show me these steps to solve this??
Nnesha
  • Nnesha
f(x) is same as y so we can replace f(x) with y \[\huge\rm \color{reD}{y}=\frac{ 3\color{blue}{x}-4 }{ 5 }\] now to find inverse(f^{-1}(x) ) you should `switch x and y ` \[\huge\rm \color{blue}{x}=\frac{ 3\color{red}{y}-4 }{ 5 }\] now solve for y

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kaylaprincess
  • kaylaprincess
multiply by five to get rid of the fraction?
Nnesha
  • Nnesha
yes right
kaylaprincess
  • kaylaprincess
doing the work one moment
kaylaprincess
  • kaylaprincess
oh so x = 3y - 4 ?
Nnesha
  • Nnesha
you should multiply both sides one u do something to the one side you Have to do the same thing to the opposite side
kaylaprincess
  • kaylaprincess
5x = 3y - 4 ?
Nnesha
  • Nnesha
yes right
kaylaprincess
  • kaylaprincess
add four now ?
kaylaprincess
  • kaylaprincess
5x + 4 = 3y ?
Nnesha
  • Nnesha
good right
Nnesha
  • Nnesha
looks good last step!
kaylaprincess
  • kaylaprincess
divide by three ?
Nnesha
  • Nnesha
that's it!
kaylaprincess
  • kaylaprincess
Thank you so much for your help and time! I really appreciate it.
Nnesha
  • Nnesha
np :=) good work!
kaylaprincess
  • kaylaprincess
thank you <3

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