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This hyperbola has a transverse axis of length 26 and is centered at the origin. Which of the equations below could be its equation?

There are no equations below.  

what does stratified random sampling find in simple terms? Also, is there a difference between stratified random sampling and just random sampling?

My goodness this is testing the memory cells.

**Yes they are different.  

Say in a school.  children are stratified into different years.  In high school where i live (NSW, Australia) the stratas would be yr 7,8,9,10,11 and 12.

If a (year) stratified random sample of 60 children is taken then

10 children would be randomly chosen from year 7

10 from year 8

...

up to 10 from year 12.

To do this, maybe all the year 7 names are placed in a hat and 10 are randomly chosen. etc.

If the 60 children were taken as a random sample then the names of all the children in the whole school would be placed in the hat and 60 would be randomly chosen.

does that make sense?

Re: x^2-1/16x * 4x^2 / 5x + 5 

This is what you have asked - I suspect it is not what you really meant.

$$x^2-\frac{1}{16}\times x\times4\times\frac{x^2}{5}\times x +5\\\\
=x^2-\frac{4x^4}{80} +5\\\\
=x^2-\frac{x^4}{20} +5\\\\$$

If you meant something different, work out where your brackets need to be and make a brand new post.

That is probably the best way.

because he wanted to get to the other side and there was some cheese but got hit by a car!!!  >:) :)

try looking here.

a² - 2a -3

IF you want to factorise it you have to find 2 numbers multiply to -3 (so one must be neg and one pos)

and add to -2 (the bigger looking one is actually negative)  must be -3 and +1

(x-3)(x+1)

On the other hand if you were asked to simplify it then you can't it already is as simple as it can be!

thanks Chris but you make this one look hard !

If you want to change a fraction to a percentage just multiply by 100 and put the % sign.

$$\frac{9}{20}\times 100\%\\\\
=\frac{9}{1}\times 5\%\\\\
=45\%$$

------------------------------------------------------------------------------ 

$$\frac{3}{25}\times100\%\\\\
=\frac{3}{1}\times4\%\\\\
=12%$$

I did this a little while ago take a look.

any questions?

http://gyazo.com/152d627a05e4fe0cf19dd64f358e6570

How can I find the height of a scalene triangle given its side angles, 6, 8, and 10?

Chris was right when he said that this is a right angled triangle but it is ALSO A SCALENE TRIANGLE.

So you can use 6 as the base and 8 as the height

or

you can use 8 as the base and 6 as the height.

or

you can use 10 as the base and do all that working that Chris did to get the height.

$${\frac{{\mathtt{6}}}{{\mathtt{100}}}}{\mathtt{\,\times\,}}{\mathtt{7.85}}$$   

just do it on a calculator.

A cylinder is just a circular prism.

The volume of any prism is the area of the base multiplied by the height.

Area of a circle is $$\pi r^2$$

therefore volume of a cylinder is $$\pi r^2 h$$

I draw this for a different question recently.  It is relevant to you.

http://gyazo.com/152d627a05e4fe0cf19dd64f358e6570

infinity is the answer

4*40 = 4*4*10= 16*10 = 160

algebra - very simply this is where letters or symbols are used to represent unknown numbers.

If you want to know more maybe you might find this clip interesting.

https://www.youtube.com/watch?v=QLFpK0ScmqA

$$\frac{10000}{1}+10e-\frac{5}{5}\\\\
=10000+10e-1\\\\
=9999+10e\\\\$$

(approx equal to 10,026 to the nearest whole number.)

This question doesn't make much sense.

-9798 is an integer.

Maria took out an unsubsidized Stafford loan of $6,925 to pay for college. She plans to graduate in 4 years. The loan had a duration of ten years and an interest rate of 5.0%, compounded monthly. By the time Maria graduates, how much greater will the amount of interest capitalized be than the minimum amount that she could pay to prevent interest capitalization? Round all dollar values to the nearest cent.

Interesting question.  Let me see if I can get my head aroundwhat you are asking.  

I don't know what the 10 years has to do with anything so I will ignore it.

---------------------------------------------------

Interest only monthly repayments would be

I=Prt  where P=$6925,  r=0.05/12 t=1  

I=6925*0.05/12 = $28.854166666  (Oh, I didn't round to nearest cent, you can do that)

She will have to pay this every month for 4 years 4*12=48months

$28.854166666*48= $1385

----------------------------------------------------

If she doesn't pay anything towards the loan then after 4 years she will owe S=P(1+r)ⁿ   

S=6925*(1+0.05/12)⁴⁸     

S=$8454.70 (to the nearest cent)

Interest part is 8454.70 - 6925 = $1529.70

----------------------------------------------------

so if she pays the interest monthly she will save herself

1529.70 - 1385.00 = $144.70

I think this is what you are being asked for.  

That's alright - We don't mind having a bit of fun sometimes.  

I probably would have fallen for it if the joke had not already been pointed out.

Pres the key marked 2nd

Clearing the mind of what?

a^2-2a-3=?

I'm assuming you want to factor this...it's just

(a -3) * (a + 1)

If you mean on the site calculator, just type in your equation, for exampe 2x + 1 = and then press enter or click on the calculator's equals sign.

We try to !!!!