hybrik
  • hybrik
What is the inverse of y=2x+7, is it y=(x+7)/2?
Mathematics
katieb
  • katieb
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hybrik
  • hybrik
Nnesha
  • Nnesha
\[\huge\rm \color{reD}{y}=2\color{blue}{x}+7\] switch x and y to find inverse \[\huge\rm \color{blue}{x}=2\color{red}{y}+7\] now solve for y
hybrik
  • hybrik
yeah, which is (x+y)/2

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Nnesha
  • Nnesha
no solve for `y` what would be ur first step ?
hybrik
  • hybrik
oops, x+7, typo
Nnesha
  • Nnesha
still.... wrong.
Nnesha
  • Nnesha
what was your first step ?
Nnesha
  • Nnesha
ello ??????...
hybrik
  • hybrik
huh
hybrik
  • hybrik
my answer was (x+7)/2 = y
Nnesha
  • Nnesha
that's wrong.
Nnesha
  • Nnesha
how did you get that ? what was ur first step ? show ur work maybe i'll able to find out the mistake...
hybrik
  • hybrik
y-7=2x
Nnesha
  • Nnesha
yes right divide both sides by 2 and then switch x and y
hybrik
  • hybrik
(y-7)/2 = x, (x-7)/2 = y
Nnesha
  • Nnesha
looks good!

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