anonymous
  • anonymous
Ok I have a couple more I can't get. These are not long problems though. Thank God. 1/9x^2+11/3x=80
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
3x/9x^2+11=80
anonymous
  • anonymous
3x= 80(9x^2+11)
anonymous
  • anonymous
Lova is it 1 11 ----- x^2 + --- x = 80 9 3

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anonymous
  • anonymous
The problem reads: Estimate a safe speed x for a car for a stopping distance of 80 feet. Use the formula below
anonymous
  • anonymous
If my equation is correct, then multiply every term by 9 because that is the common factor
anonymous
  • anonymous
you should get x^2 + 33x = 270
anonymous
  • anonymous
I put that in my assignment and it says that is not right. I have been trying to get this on for a while now
myininaya
  • myininaya
9(80)=720 right?
dumbcow
  • dumbcow
blexting i think you had a typo* x^2 + 33x = 720 move 720 over and try to factor
anonymous
  • anonymous
OH MY you are right... x^2 + 33x = 720
anonymous
  • anonymous
x^2 + 33x - 720 = 0
myininaya
  • myininaya
720=10(72)=20(36)=60(12)=30(24)=15(48) -720=48(-15) 33=48+(-15)
anonymous
  • anonymous
(x + 48)(x - 15) = 0 x = -48 or x = 15 Since this deals with speed use the x = 15
anonymous
  • anonymous
thanks myininaya
myininaya
  • myininaya
your welcome
anonymous
  • anonymous
You guys are awesome. Thank you so much
amistre64
  • amistre64
yay!!

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