Ok I have a couple more I can't get. These are not long problems though. Thank God. 1/9x^2+11/3x=80

Question

anonymous · Answer

3x/9x^2+11=80

anonymous · Answer

3x= 80(9x^2+11)

anonymous · Answer

Lova  is it          1                   11
                     ----- x^2  +    --- x = 80
                         9                     3

anonymous · Answer

The problem reads: Estimate a safe speed x for a car for a stopping distance of 80 feet. Use the formula below

anonymous · Answer

If my equation is correct, then multiply every term by 9 because that is the common factor

anonymous · Answer

you should get    x^2 + 33x = 270

anonymous · Answer

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 · Answer

9(80)=720 right?

dumbcow · Answer

blexting i think you had a typo*
x^2 + 33x = 720
move 720 over and try to factor

anonymous · Answer

OH MY you are right...

x^2 + 33x = 720

anonymous · Answer

x^2 + 33x - 720 = 0

myininaya · Answer

720=10(72)=20(36)=60(12)=30(24)=15(48)
-720=48(-15)
33=48+(-15)

anonymous · Answer

(x + 48)(x - 15) = 0

x = -48 or x = 15

Since this deals with speed use the x = 15

anonymous · Answer

thanks myininaya

myininaya · Answer

your welcome

anonymous · Answer

You guys are awesome. Thank you so much

amistre64 · Answer

yay!!