PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Find the solution(s) to the system. Round answers to the nearest hundredth, if necessary. y=-0.5x^2+6
y=3.25

Question

PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Find the solution(s) to the system.  Round answers to the nearest hundredth, if necessary.  y=-0.5x^2+6
                     y=3.25

anonymous · Answer

y=$$-0.5x^2+6=3.25$$

anonymous · Answer

x^2=5.5

theeric · Answer

But, would you round up, @Krishnadas ?

anonymous · Answer

isnt this rounded to the 100th?

theeric · Answer

I got $\sqrt{5.5}\approx 2.3452078799117147772828150567722$
And since the thousandths place is 5, you add one-one hundredth.

anonymous · Answer

thats how its done?In physics 2.345=2.34

anonymous · Answer

idk..

theeric · Answer

And, I don't know when this is taught, but it would be $\pm$.

theeric · Answer

For real numbers.

theeric · Answer

Huh, I wasn't taught that...

anonymous · Answer

hmm.ok.ok

anonymous · Answer

can you round it up?

theeric · Answer

I was always taught if the number was 5 or higher you round up. If the number is like $.2345000$, forever zeroes, then the number is exactly between $2.34$ and $2.35$. If it is any more, even one-millionth, then it is closer to $2.35$.

theeric · Answer

Even one-quintillionth. Which I guess is $10^{-18}$, which I never knew but makes sense.

anonymous · Answer

so..what should be the final answer

theeric · Answer

I guess it depends on which method you use. I've learned my way since I was young, and it makes more sense to me.

anonymous · Answer

2.35

anonymous · Answer

@theEric there is this rounding off calculator in the internet which gave 2.35

theeric · Answer

http://www.mathsisfun.com/numbers/rounding-methods.html See the "common way" I like the symmetric way! :) So 2.35.