caitlinnr14
  • caitlinnr14
Please HELP WILL GIVE MEDAL! [3.06] Given the function f(x) = −2x + 8, find x if f(x) = 22. −36 −7 52 −15 (please explain)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
It's a function. Just plug 22 in everywhere you see x in the function. 22 is called the argument.
anonymous
  • anonymous
Be careful as they get more complicated...if the argument is negative, I like to put parentheses around it before I plug it in...this makes me think about order of operations.
zpupster
  • zpupster
not quite, I think f(x) = 22 so replace f(x) with 22 and then solve for x

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More answers

caitlinnr14
  • caitlinnr14
oh ok wait who is correct
anonymous
  • anonymous
f(x) = 2(x+6) = 22 2(x+6) = 22 2x + 12 = 22 2x = 10 x = 5
zpupster
  • zpupster
well some people like to think f(x) as y so y = -2x + 8 and y = 22
anonymous
  • anonymous
Oh whoops! Sorry...xpupster is right. I was reading too fast, just answered a similar problem
zpupster
  • zpupster
there is no 5 in your multiple choice try to solve the way I showed you
caitlinnr14
  • caitlinnr14
ok
caitlinnr14
  • caitlinnr14
wait there os no 5 @kathy0514
anonymous
  • anonymous
Follow Kathy's model but use the function in your problem. Notice that she used a different function
caitlinnr14
  • caitlinnr14
−7
anonymous
  • anonymous
Sounds good :)
zpupster
  • zpupster
good job cait
anonymous
  • anonymous
great job!
caitlinnr14
  • caitlinnr14
yay thxx guys
anonymous
  • anonymous
bye

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