All Answers 358098 Answers

66683.3395759390562933

o ok, didnt change it to exponental form to see that. Thanks! :D

3 because  4^3=64

Remember, a log is a power .

Radians and degrees both measure angles. 

There are  2pi radians in a revolution and there are 360 degrees in a revolution.

Well, we constantly remind children not to give out their full names, addresses, schools, telephone numbers etc.  We advise them on how to deal with unpleasant messages and I am very available if they want to discuss any issues by private messages.  (As is CPhill if they prefer to approach him.)

So I think this site is as safe as any internet site can be.  And safer than most of them are.  

We have a few adult mathematicians working the site.  They are all wonderful prople.  We have many young members.  Again they overwealmingly lovely people.  This is a children's maths site.  It is as safe as it gets.

$${\frac{{\mathtt{5}}}{{\mathtt{7}}}} = {\mathtt{0.714\: \!285\: \!714\: \!285\: \!714\: \!3}}$$

I just entered  5/7

I would like to see this answered too please :)

@@ End of Day Wrap Tues 14/4/15 Sydney, Australia Time 10:30 pm ♪ ♫

 Hi everyone,

Answer credits today are awarded to Zacismyname, Nauseated, Cphill, asharGhaffarloo, Anika121, Jerico, ThisGuy, BrittanyJ, Callipio, Mellie, Geno3141, Badinage, Cota888, AmandaXo, Harrypotter, Sasini and Heureka.   A big thank you to each of you   

Interest posts:

FTJ means "For the Juniors"

Wed 15/4/15

FTJ means "For the Juniors"

That is ok 

If you have learned a little about brackets and order of operation than I am very pleased :)

That is great Badinage :)))

I don't know anon, I am kinda curious.   

Hi Nauseated :)

Here is the graph

7xy:14y

xy:2y

x:2

$$\\x^2 - (1.8*10^{-5})x + (1.8*10^{-6}) = 0\\\\
10^6x^2 - (1.8*10^{-5}*10^6)x + (1.8*10^{-6}*10^6) = 0*10^6\\\\
10^6x^2 - (1.8*10)x + (1.8) = 0\\\\
10^7x^2 - (180)x + (18) = 0\\\\$$

  $$\triangle=180^2-4*10^7*18<0\qquad \text{therefore no real roots}$$

just    $${\mathtt{x}}{\mathtt{\,-\,}}{{\mathtt{x}}}^{{\mathtt{2}}}$$   it cannot be simplified.

acos (7/60)

$$\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}^{\!\!\mathtt{-1}}{\left({\frac{{\mathtt{7}}}{{\mathtt{60}}}}\right)} = {\mathtt{83.300\: \!234\: \!822\: \!24^{\circ}}}$$

$$\\\frac{0.008}{72}=\frac{0.008*1000}{72*1000}=\frac{8}{72000}=\frac{8\div 8}{72000\div 8 }=\frac{1}{9000}$$

Hi anon,

255/255 is also correct but it is not simplified.

It is better to cancel BEFORE you multiply - it is easier that way   

  $$\frac{255}{225}=\frac{17*15}{15*15}=\frac{17}{15}$$

$$\\\sqrt{512k^2}\\
=\sqrt{4*128}*\sqrt{k^2}\\
=\sqrt{4}*\sqrt{128}*\sqrt{k^2}\\
=\sqrt{4}*\sqrt{4}*\sqrt{32}*\sqrt{k^2}\\
=\sqrt{4}*\sqrt{4}*\sqrt{16}*\sqrt{2}*\sqrt{k^2}\\
=2*2*4*\sqrt{2}*k\\
=16k\sqrt2$$

Here are a couple of sites that you might find helpful

Thanks Zac :)

Gradient, m =$${\frac{{\mathtt{dy}}}{{\mathtt{dx}}}}$$   therefore $${\frac{\left({\mathtt{4}}{\mathtt{\,-\,}}{\mathtt{1}}\right)}{\left({\mathtt{\,-\,}}{\mathtt{4}}{\mathtt{\,-\,}}{\mathtt{16}}\right)}} = {\mathtt{\,-\,}}{\frac{{\mathtt{3}}}{{\mathtt{20}}}} = -{\mathtt{0.15}}$$

Equation of a line $${\mathtt{y}}{\mathtt{\,-\,}}{\mathtt{y1}} = {m}{\left({\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{x1}}\right)}$$ Thus, (you can use any point on the line to sub in here)

$${\mathtt{y}}{\mathtt{\,-\,}}{\mathtt{1}} = {\mathtt{\,-\,}}\left({\mathtt{0.15}}{\mathtt{\,\times\,}}\left({\mathtt{x}}{\mathtt{\,-\,}}{\mathtt{16}}\right)\right)$$

Then you can re arrange to get in any format

if you think about it carefully you'll find the answer. which is 2

Infinity is NOT an irrational number.

It is not a number at all.

It is a concept.   

You can multiply a number by some expression that is tending to infinity.  

If the number is pos the answer will be +infinity

If the number is negative the answer will be - infinity