All Answers 358179 Answers

The area of a triangle is given by (1/2)base*height so here:

35 = (1/2)*10*height

Can you rearrange this to find the height (which will be in cm)?

.

Do you mean 2(x² + √(x⁴) - 1)?  

If so, this simplifies to: 2(x² + x² -1) → 2(2x² - 1) → 4x² - 2 

Use the calculator on this site.  Press the 2nd button, then acos (which means cos^-1) then 0.6689.

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}^{\!\!\mathtt{-1}}{\left({\mathtt{0.668\: \!9}}\right)} = {\mathtt{48.017\: \!777\: \!054\: \!356^{\circ}}}$$

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twenty wan

9 + 10 is 21

21 21 21 21 21 21 21 21 21 21 21 21 21 21

How do I simplify the equation 3y^2-3 over y^2-1 ?

$$\dfrac{3y^2-3 }{ y^2-1}\\\\
=\dfrac{3\cdot(y^2-1) }{ y^2-1}\\\\
=3$$

then answer is!

51.8941229813164874

$$\\\frac{3y^2-3 }{ y^2-1}\\\\
=\frac{3(y^2-1) }{ y^2-1}\\\\
=3$$

Of couse I will welcome you back but you are still posting as anonymous.  

Thank you Alan,

I still don't understand but it doesn't matter.  I don't understand anything much lately. 

Thank you for trying to explain.

.....I have a username.I used to post question as a menber.But i didnt post question in this forum.so, do you welcome me back to this forum as a menber? 

Yes, ok Melody, but in your original answer you didn't really give the inverse function, which would be y as a function of x (and if there had been more than one real answer, which would you have chosen?).

@@ End of Day Wrap    Tues 24/2/15     Sydney, Australia   Time 12:35 am  (Really Wed morning)    ♪ ♫

Hi all,

Today's answerers:  Bertie, Geno3141, Alan, GenericUsernameHere, CPhill, Tetration, Anima, Badinage, saseflower and dogeminer.   Withour you there would be no forum.  Thank you so much. 

Oh, we missed saseflower's birthday.    

It was on the 12 Feb and Saseflower became a teenager. 

We all hope that you had a wonderful birthday Saseflower.       

Here is a gift just for you.    http://gyazo.com/2d3ad258c69afbd62592636d90a2822b

Interest posts:

25/2/15

this calc is not great for graphs  (it is great for other things)

I suggest that you use this site

im being dead serious right now fam

You have said this before i think Alan but my answer is the same as Chris's and I have found the derivative as requested.

Can you give me an example of where my way would give a false answer? 

I am assuming that all valid answers that I find are good but that sometimes my answer might not be valid.

I'll see if I can answer my own question

$$\\y=\sqrt{x}-1\qquad y\ge -1,\;\; x\ge 0\\
my\; way\\
$inverse function$\\
x=\sqrt{y}-1\qquad x\ge -1,\;\;\;y\ge 0 \\
y=(x+1)^2\qquad x\ge -1,\;\;\;y\ge 0 \\$$

What is wrong with that?     How should I do it ??

Thanks Bertie :)

This post is in Hebrew. I am sorry but the translation does not make sense.

הודעה זו היא בעברית.

אני מצטער, אבל התרגום לא הגיוני.

$$\\\frac{1sek}{0.1528\;dollar}=\frac{x\;sek}{1\;dollar}\\\\
\frac{1}{0.1528}=x\\\\$$

$${\frac{{\mathtt{1}}}{{\mathtt{0.152\: \!8}}}} = {\frac{{\mathtt{1\,250}}}{{\mathtt{191}}}} = {\mathtt{6.544\: \!502\: \!617\: \!801\: \!047\: \!1}}$$

$1 =  6.54 sek

arc tan is the same as inverse tan  :)

$${\mathtt{40}}{\mathtt{\,-\,}}{\mathtt{8.95}}{\mathtt{\,-\,}}{\mathtt{1.97}}{\mathtt{\,-\,}}{\mathtt{6.93}} = {\mathtt{22.15}} = \tiny\text{Error: }$$

Thanks Chris,

why does

infinty - infinity = infinity ?

sorry Badinage - your answer was not up yet when I started.