anonymous
  • anonymous
-5/8c = 20 a. -34 b. -32 c. 32 d. 34
Mathematics
jamiebookeater
  • jamiebookeater
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ajprincess
  • ajprincess
1.Multiply both sides by 8 2.divide by -5 both sides
anonymous
  • anonymous
That doesn't work
ajprincess
  • ajprincess
|dw:1347991198303:dw||dw:1347991271931:dw|

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anonymous
  • anonymous
This is a proportion. -5/8c = 20/1 To solve a proportion, cross multiply 20(8c) = -5(1) 160c = -5 Then divide both sides by 160 c = -5/160 c = -1/32
anonymous
  • anonymous
Ok which is it -32 or 32??
ajprincess
  • ajprincess
what do u think?
ajprincess
  • ajprincess
-32 or 32?
anonymous
  • anonymous
check both of them in the original equation
anonymous
  • anonymous
with 32 I got -20 and with -32 it was WAY off, I'm confused now....
anonymous
  • anonymous
i already said it's -1/32
anonymous
  • anonymous
This is a proportion. -5/8c = 20/1 To solve a proportion, cross multiply 20(8c) = -5(1) 160c = -5 Then divide both sides by 160 c = -5/160 c = -1/32
anonymous
  • anonymous
-1/32 is NOT an option
ajprincess
  • ajprincess
|dw:1347991694227:dw| Decide nw.
anonymous
  • anonymous
-1/32 checks... in addition this calculator said -1/32 is right as well: http://www.wolframalpha.com/input/?i=-5+%2F+8x+%3D+20 the multiple choice options are all wrong
anonymous
  • anonymous
It was -32 Thanks AJ Princess! <3
ajprincess
  • ajprincess
yw.:)

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