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Exactly my point of saying it is indefinable

\(131 313 - 555 - 1 = 130 757\)  

Well, infinity plus infinity(if you were associating infinity as a number) would make a bigger number altogether,

No.

The set of symbols

\(\infty + \infty > \infty\) 

is meaningless.  You cannot do arithmetic with infinity.

Well, infinity plus infinity(if you were associating infinity as a number) would make a bigger number altogether, therefore making infinity indefinable. Same goes with multiplication. Everything divided by itself equals 1 so it is definable. Same with subtraction which equals 0. For the last two they could be indefinable as infinity is forever being bigger.

\(\dfrac 1 0 \text{ is undefined.}\)

\(\infty - \infty \text{ is meaningless, you can manipulate this to be any value you like.}\\ \\ \text{It certainly doesn't equal 0.}\)

\(\text{The whole "proof" is nonsense.}\)​

It turns out that calculating relative humidity is a complicated busuness. You can go to this site and see if you can understand how it is calculated:

http://www.theweatherprediction.com/habyhints/186/

Using the Math Olympiad Method, we can't find out a pattern.

Using a graphing calculator, it is very difficult.

Therefore, we can't solve it easily.

Let first worker=A
Let second worker=B
1/A + 1/B=1/12
A/2 + B/2=25, solve for A, B
A=20 days working alone
B=30 days working alone

Sorry Rom: I get different answer. Remember that 1/12 of the work is done in 1 day. Therefore, working together, they would finish the job in: 1/20+1/30=1/12. And each man working alone, would finish 1/2 of the 2nd. job in: 20/2=10 days for worker A. And 30/2=15 days for worker B. So that: 10 + 15 =25 days. At least that is my take on it!!.

\(\left ( 19 \over 0 \right ) \over 4 \\ = ∞ \over 4 \\ = ∞\)    

Try typing one sentence each like this

40 + 2.0 * 160

40 - 2.0 * 160

Length of needle = Radius of Circle

                            = 22 cm

Circumference of circle = \(2πr \\ = 2π \times 22 (π = 3.142) \\ = 2 \times 3.142 \times 22 \\ = 6.284 \times 22 \\ = 138.248\)           

\(360º = 138.248cm | ÷ \frac{360}{124} \\ 124º = 47.619cm\)

The answer is rounded to 3 decimal places.

Answer: 47.619 cm

20/2=10

One jump 1.5 inches less = 9'10.5"

And the other 1.5 inches more = 10'1.5"

just as long as i can graph it on a graphing calculator

OKAY... THIS IS SOMETHING I KNOW REALLY WELL ;).

okay here :),

here are the two states;

1. a low state, witch is basically phisical ground, a binary 0, 0V.

2. a high state, witch is also basic, a phisial scource, a binary 1, common to be 5V.

here are the logic gates;

BUFFER, output is input

NOT gate/INVERTER, output is opposite to input,

AND gate, output is high when all inputs are high,

XOR gate, output is high when ONLY an odd number of inputs are true, also known as if and only if,

XNOR gate, negatave output to a XOR gate, XOR gates output attached to a NOT gate, output is true ONLY if an even number of inputs are true,

universal gates (the ONLY gates that can make any other gate just by using them);

NAND gate, negatave output to the AND gate, AND gate with its output attached to a NOT gate, output is high unless all inputs are high,

NOR gate, negatave output to the OR gate, OR gate with its output attached to a NOT gate, output is high whenever no input is high.

15/22 is as reduced as it can go AS A FRACTION   ...otherwise it is  15 divided by 22 =  .68181818....

Two workers, if they were working together, could finish a certain job in 12 days. If one of the workers does the first half of the job and then the other one does the second half, the job will take them 25 days. How long would it take each worker to do the entire job by himself?

The key to this is that the rates they work at add.

\(\text{We get 3 equations.}\\ \\ (r_1+r_2)12=1 \\ \\ r_1 t = r_2(25-t) =\dfrac 1 2\\ \\ r_1 t + r_2 (25-t)=1\)

you can pound through these equations to obtain

\(r_1=\dfrac 1 {20},~~r_2=\dfrac{1}{10}\\ \\ \text{And thus worker 1 would finish in }\dfrac 1{r_1} = 20 \text{ days.}\\ \\ \text{and worker 2 would finish in }\dfrac{1}{r_2} = 10 \text{ days.}\) 

5x+2(x-3)

5x + 2x + 2 (-3) =

7x - 6

20 feet is   20 x 12 = 240 inches

One jumper jumped 3 inches farther   240 - 3 = 237  how far they both would have jumped

237/2 = 118.5        for the Short Jumper    118.5 + 3 = 121.5 for the Long Jumper

what is 9% out of 3210 dollars.

9% means=9/100 =.09 x $3,210=$288.90

9% is   9/100  or .09

9% of 3210    is equal to    9/100 (3210)   or   .09(3210)    = $  288.90

Solve for x:
x^3+x^2+x+1 = 0

The left hand side factors into a product with two terms:
(x+1) (x^2+1) = 0

Split into two equations:
x+1 = 0 or x^2+1 = 0

Subtract 1 from both sides:
x = -1 or x^2+1 = 0

Subtract 1 from both sides:
x = -1 or x^2 = -1

Take the square root of both sides:
Answer: |  x = -1      or    x = i     or      x = -i                                      

You can break it up into:

(x+1)(x2) +(x+1)   and further

(x+1)(x^2 +1) = 0

So either x+1 = 0  or x^2+1 =0

Which means   x=-1   or  i           Agree with guest  ,  I forgot   -i

1.51 x 10^26 x 20 =3,020,000,000,000,000,000,000,000,000 Number of atoms in 20 kg of He.

=3.02 x 10^27 in scientific notation.