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parallelogram

If you are doing it on a calculator, then the reason why is because nobody in higher levels of math use remainder, they use an approximation of the number as it is actually applicable to many mathematics. Otherwse, remainders are obsolete and need to be found by hand.

agreed percentages are out of 100% or 1 and frcations are out of 1

so there for 1/2 is 100 devided by 2 witch is 50%

1/2 is also equal to 1 devided by 2 witch equals 0.5

so you see 100% also equals 1 so 0.5 can be transfered to 50%

Just divide: 64 /( 3 1/4) =19.7 miles per inch. So, the scale on the map is

1 inch for every ~20 or so miles.

Well if you want to make a decimal into a percentage all you need to do is multiply that decimal by 100 and slap a percentage sign on the result.

From fractions you need to convert the fraction into a decimal, then repeat the steps above.

ask for the perimeter of a plate

its 25 :-D 

That depends on what you need for the sphere, such as surface area or volume...

2+25=27

OH OH I GOT DIS!

If you need a good way to memorize it just sing this song (to the tune of Pop Goes the Weasle):

x equals negative b

Plus or minus the square root of 

b squared minus four ac

All over 2a

There's also some videos on this so check them out if you can.

Hope this helped c:

Newborn child receives a $8,000 gift toward a college education from her grandparents. How much will the $8,000 ne worth in 19 years if its invested at 7% compounded quarterly?

FV=8,000[1 + .07/4]^(4*19)

FV=8,000[1.0175]^76

FV=8,000 x 3.7378....

FV=$29,902.38

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

30 

-2x+y+4z = 5     (1)     

x+3y-z = 2          (2)

4x+y-6z = 11       (3)     

Multiplly (2) by - 4    and add it to (3)

-4x - 12y + 4z  = - 8

 4x +    y -  6z  = 11

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

        -11y - 2z  = 3   (4)

Multiply (2) by 2 and add it to (1)

2x + 6y - 2z  = 4

-2x + y + 4z  = 5

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

        7y + 2z  = 9    (5)

Add (4)  and (5)

-11y - 2z  = 3

 7y  + 2z  = 9

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

-4y   = 12         divide both sides by -4

y = -3

And using (5)  ....     7(-3) + 2z  = 9   →  -21 + 2z = 9   → 2z = 30  → z = 15

And using (2)   ...... x+3(-3) - 15 = 2  →  x - 9 - 15  = 2 →  x = 26

So   { x, y, z }   = { 26, -3, 15 }

sin(x)=1/3 = x≈19 degrees

It is undefined.

You cannot divide by 0

The new area  will be n^2 times as much as the old

Proof :    new base  = n*b       new height  = n*h

So  ....  new area  /  old area  =    [  nb * nh] / [ bh ]  =  [n^2 * bh] / [bh]   = n^2 

ln6.21 = 0.1*t    divide both sides by 0.1

ln (6.21) / 0.1   = t  = about 18.26

Sorry.......I meant to say that there were 12 parts  of 228 consisting of 19 people each

An easier way of looking at it is that for each of these 12 parts there were 5 professors.....

.....so....12 * 5   = 60

And for each of the 12 parts there are 14 lecturers  ....so....12 * 14 = 168

I hope that is a little better.....