All Answers 358090 Answers

I guess you are right.

Thanks CPhill and Civonamzuk, 

I decided to test my skills with GeoGebra and see how many I could construct.

Each one has 9 on the bottom and 7 on the left.

Each triangle has the angle in a different place with respect to the sides.

I think that they are all different.

I get 4 triangles

Oh no I am sorry the angle had to be opposite the 9

In that case I get 1  

Sorry   

Sorta like if you chopped an apple into 1000 equal pieces, and had six of those pieces.

In the figure below, AB = AC = 50, AD = 52, and  BC = 28. Determine CD.

                                                                                                                                                                              "h" is the height of the triangle  ABC.                                                                                                                                                                                                                                                                                                           

h² = (AC)² - (BC/2)²

h² = 50² - 14²

h = sqrt(50² - 14²)

h = 48

(CD+14)² = (AD)² - h²

(CD+14)² = 52² - 48²

(CD+14)² = 400

CD = sqrt(400) - 14

CD = 6

3.14

This is the tipical Pi, but there are a lot of numbers bellow...

3.1419

3.1444

3.2435

ALL OF IT ARE PI NUMBERS!!!

Six one-thousandths 

Inverse Matrix Method

Example:

Step 1: Rewrite the system using matrix multiplication:

and writing the coefficient matrix as A, we have

.

Step 2: FInd the inverse of the coefficient matrix A. In this case the inverse is

Step 3: Multiply both sides of the equation (that you wrote in step #1) by the matrix A-1.

On the left you'll get

.

On the right, you get

and so the solution is

That looks great MG  :)

Thanks Chris,

I have many 'secret' talents   LOL

cos(180*8.5/17) ----> ?

tnx

I have never heard this called 'inversion method' before.

Is that the common term for matix solutions?

Very nice, Melody.......I didn't know that you were an Excel "whiz,'  too  ....   !!!!

8x-9y=16.5 and 7y-2x=-6.5   rearrange as

  8x - 9y  = 16.5

-2x  + 7y = -6.5        multiply this equation by 4   ...so we have....

 8x  -  9y  =      16.5

-8x + 28y =   - 26          add these equations together

         19y  =  -9.5         divide both sides by 19

  y  = -1/2

Now, substitute this back into any equation to find x

-2x + 7(-1/2)  =  -6.5

-2x - 7/2   =    - 13/2      add 7/2 to both sides

-2x  = -6/2

-2x  = -3     divide both sides by -2

x = 3/2

So the solution is  (x, y)  = (3/2, -1/2)

thaaaank u very much stuck on this too long :D

6*sin(180*8.5/17)

$${\mathtt{6}}{\mathtt{\,\times\,}}\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{sin}}{\left({\frac{{\mathtt{180}}{\mathtt{\,\times\,}}{\mathtt{8.5}}}{{\mathtt{17}}}}\right)} = {\mathtt{6}}$$

this is just 6*sin90 = 6*1=6    so this is correct,

in EXCEL the angle has to be entered in radians so this is how to do it.

=6*SIN((PI()/180)*(180*8.5/17))

of couse this can just be simplified to       

=6*SIN(PI()*8.5/17)

pi is a function but it has no arguments - that is why your need the empty brackets :)

a spark is fine, as long as it is contained

Heather, you've been fired for trying to mock my Channel! Go make your own one. maybe Channel 21, but Channel 12 is MINE!!!!

no no, katniss. poorly misguided, let someone who's real name is Roman help. after all you were created after me, katniss. what a brilliant author Suzanne Collins is, but how a awesome filmmaker kinji Fukasaku is

anyways, your answer is son:

IX DCLXXXVII

There, you happy now?

also, BATTLE ROYALE FTW