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This is an English website. No need to show off. XD

With my luck, when you get back on I'm not gonna be here😪

            -Victoria

And Katie, why were you on so darn early?

            -Victoria

Hi Katie! It's been forever since I've heard from you.😀 I missed you. XD

                  -Victoria 

what is 5+5

8$ bro 

antilog 5 means   \(10^5=100\;000\)

because   \(1og_{10}100\;000=5\)

Hi, thanks CPhill and guest.

I am just going to look at this bit

sin^2x  =   [1 - cos(2x)] / 2   =  1/2  - cos(2x)/2

\(sin^2x =\frac{ 1 - cos(2x)}{2} \)

I am hopeless (also stuborn) aboul learning formulas.  I just remember what I feel i have to remember and work the others out each time.

So I do not remember this one :/

\(Cos(A+B)=cosAcosB-sinAsinB\qquad \mbox{I have committed this to memory}\\ cos(2x)=cos^2x-sin^2x\\ cos(2x)=1-sin^2x\;\;\;\;\;-sin^2x\\ cos(2x)=1-2sin^2x\\ cos(2x)-1=-2sin^2x\\ \frac{cos(2x)-1}{-2}=sin^2x\\ sin^2x=\frac{1-cos(2x)}{2}\\\)

If I need sin^2(2x)   or  cos^2(x)  etc I got through a similar procedure.  

It doesn't take me long because I have had a LOT of practice :)

Thanks Chris, 

This is a clip to show you how to find the legth of the diagonal of the cube

If the total area of a trapazoid is 21 square feet, one of the bases is 5 feet and the other base is 2 feet, what is the height?

The area of a trapezium is the average of the parallel sides times by the perpendicular height.

Tha average of the parallel sides is  (5+2)/2 = 3.5 feet

21=3.5*height

height = 21/3.5 = 6 feet

Yes, we are all in agreement :)

Bertie's method works :)

It works in base ten and all other bases as well. :)

The other two methods also work well and if it was going to be taught at school I would use #2 guests method because it is easiest to understand.

In order to understand Chris's or my own reasoning demonstration of Bertie's method you need to understand #2 method.

The #2 guest's method brings the problem down to a basic conceptual knowledge of place value.

Hi HeatherFeather, we have not seen you in ages.

It has been so long that I am using your 'Heather of the Future' name     

Happy New Year KatieLeigh  

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-4y + x - 3 = 3y - 3x      add 4y to both sides

x - 3  = 7y - 3x             add 3x to both sides

4x - 3  = 7y                   divide both sides by 7

(4/7) x   - (3/7)   =   y        or, written a little differently........

[ 4x  - 3 ] /  7   =   y

Solve for y:
-3+x-4 y = 3 y-3 x

Subtract -3+x+3 y from both sides:
-7 y = 3-4 x

Divide both sides by -7:
Answer: | y = (4x)/7-3/7

solve 4x-7y-3 = 0  This is called "Linear Diophantine Equation". It has an infinite number of solution in whole integers. Such as x=6, y=3 or x=13, y=7..........etc.

2.34×10^305+5.24×10^65+6.66×10^62+7.000000123×10^57+

+1.0000000000000406000000000000500324008×10^37

\((-g)-(-2g)\)

\((-g)+2g\)

\(g\)

Take $52.50 and divide it by 7 to get the price per hour and when you do that you get $7.50/hour

So, what happened?

\(7/50\)

Read it as 7 divided by 50 and when you do that you get 0.14

a pastry with a fruit filling such as apple, cherry, or blueberry

Whoops.  My answer is wrong.  I may have inputed the wrong numbers into the calculator.  The actual answer is actually approximately equal to $227,272.73.  Sorry about that.

It is the circumference of a circle divided by its diameter.

This number is always the same.

It is called pi and it is an irrational number that is approximately equal to 3.14159