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That's great happy!

Perhaps anon wanted to know how to put a fraction into the calc or perhaps onto the forum.

It is hard to know what they really wanted.

So you did great   

3 and 15 are the answers. When in perentheses, you subtract the negative sign

well look at this

whhhaaaat burn

dude, how r u soooo awesome? How can I be as awesome as u are??? :D

Multiply the numbers together and add the exponents of teh factors that have the same base:

2·4 = 8         b·b^2  =  b^3     c^3·c^7  =  c^10

answer:  8b^3·c^10

If you're supposed to show that (11^-4)^-6 = 11; it doesn't.

If you're supposed to find the exponent on 11 to make it true:  since you have an exponent to an exponent, multiply the exponents together:  -4 x -6  =  24.       11^24 is the simplified expression.

N = 7·L·H

2310  =  7·30·H

2310  =  210·H                      (now, divide both sides by 210)

2310 ÷ 210  =  11

H = 11 feet

$${\left({{\mathtt{11}}}^{-{\mathtt{4}}}\right)}^{-{\mathtt{6}}} = {\mathtt{9\,849\,732\,675\,807\,611\,094\,711\,841}}$$

There are ten digits:  0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.

The probabiliy of guessing the first digit correctly is 1 in 10, or 1/10.

That is also the probability of guessing the second digit correctly, and also the third digit correctly, and also the last digit correctly.

Since you must get the first digit correct AND the second digit correct AND the third digit correct AND the last digit correct, multiply 1/10 x 1/10 x 1/10 x 1/10 to get 1/10000.

(You multiply when you have 'and' and when the different parts are independent. In this case, the different parts are independent because guessing the first digit correctly does not affect guessing the second digit correctly, etc.)

Or, another way:  there are 10000 numbers starting with 0000 and 9999. Guessing any one of these 10000 numbers correctly is 1/10000.

Pi is a number most commonly used with circles.  The value of pi is infinite but can be summazied by 3.1415926535 (or 3.14).  Pi is used to calculate the circumference of circles (pi times diameter) and the area of a circle (pi times radius squared).

Show them this:

Well, 7+9=16

And I also know 7*9=63

Interesting problems ...

1)  x > -3   --->   (-3, ∞)           x ≤ 3    --->   (-∞, 3]          or:  union:      (-3, ∞)  ∪  (-∞, 3]  =  (-∞, ∞)

2)  4x + 3 ≤ 11   --->   x ≤ 2   --->   (-∞, 2]

     6x > 25   --->   x > 4 1/6   --->   (4 1/6, ∞)         or:  union:    (-∞, 2]  ∪  (4 1/6, ∞)

3)  3x - 9 < -18     --->  x < -3   --->   (-∞, -3)

     -6x + 2 > -28   --->   x < 5   --->   (-∞, 5)         and:  interesect:  (-∞, -3)  ∩  (-∞, 5)  =   (-∞, -3)   

The 'r' stands for the length of the radius of the circle.

If you are to simplify this by multiplying out, use FOIL -- First, Outside, Inside, Last ---

(7x - 4)(2x - 5)

=  (7x)(2x) + (7x)(-5) + (-4)(2x) + (-4)(-5)

=  14x² - 35x - 8x + 20

=  14x² - 43x + 20

This can be calculated by using a fraction:

Count the number of letters in the word (in this case, 9) and create the numerator by the factorial of that number.

Since there are 9 letters in the word COMMITTEE, the numerator is  9!

Count the number of times each different letter is used and create the numerator by multiplying together the factorials of those numbers.  OK, that description may be clear as mud, so here's an example:

For COMMITTEE, the C is used once:  1!, the O is used once: 1!, the M is used twice: 2!, the I is used once: 1!, the T is used twice: 2!, and the E is used twice: 2!.

Putting these together, the denominator is  1!·1!·2!·1!·2!·2!  

So the answer is:  9! / [ 1!·1!·2!·1!·2!·2!  ]  =  45360

(A couple things about the denominator:  you really don't need to write down all the 1!, because their values are 1, but if you do, the sum of the numbers used in the denominator is equal to the number of letters in the word.)

Another example:  MISSISSIPPI  =  11! / [ 1!·4!·4!·2! ]

To make a negative, just hit the - symbol....for example (-1)

$${{\mathtt{8}}}^{{\mathtt{2.666\: \!666\: \!666\: \!666\: \!666\: \!7}}} = {\mathtt{256}}$$

e is a special number (like π).

Its value is 2.718281728459... and will be found on scientific and graphing calculators.

The problem 8.681277e + 33 means to use that key, multiply that value times 8.81277 and then add 33.

However, if the problem is 8.681277e^(+33), then use the e key, take it to the 33rd power and then multiply that answer by 8.681277.

Since both 8 and 256 are multiples of 2, by playing with exponents on 2, I got:

          2^3 = 8     and     2^8 = 256

So now,    8^?  =  256     becomes     (2³)^?  =  2^8

When you are raising an exponent to an exponent, multiply the exponents together, so now we have:

         2^(3·?)  =  2^8

This becomes:  3·?  =  8        --->   ?  =  8/3

Hey yall!  Let's make 300!

Using a set of data to find a pattern of numbers to predict the future can lead to wrong conclusions. This is especially true, if the pattern is used to predict something in the far future.

For instance, predicting weather can be done quite accurately for the near future: tomorrow, the next day, maybe even next week. But he father into the future, the less accurate this prediction becomes.

Another problem arises when the wrong type of math formula is used; a straight line may fairly accurately describe what happened last year, but a curved line may be needed to describe what will happen the next few years.