All Answers 358087 Answers

Try 1/0.1 then 1/0.01 then 1/0.001 then 1/0.0001 etc. where the denominator is getting closer and closer to 0.  

Does it look like the fractions are getting closer to zero?

Informally, the limit is tending to infinity, rather than zero.  However, strictly, division by zero is still undefined.  If you allow it you can prove silly things like 2 = 1.

. 

or alan. its 0.

THEN YOUR ANSWER IS 0 NUMBER THINGYS!!!! (its not undefined, melody)

Division by zero is undefined mathematically, because, if you try to allow it, you get all sorts of inconsistencies appearing in your calculations.

.

sounds complicating. well at least ive seen another benefit of signing up: looking at the future of math class

Possibly in your senior year, but I'm not familiar enough with what you learn when to say for certain.  Perhaps there is someone else in the forum who has learned about matrices recently who could give you a more definitive answer.

. 

WHOA!!! what grade do i learn that?

If you have a 3x3 matrix, A, say, its inverse is another 3x3 matrix which, when multiplied by A results in a 3x3 matrix that has zeros everywhere except on the main diagonal (top-left to bottom right) where the numbers are 1.

For example:

.

Have a look at Melody's picture above.  Each row starts and ends with the number 1 and the other terms are constructed by adding together the two terms nearest to it in the row above.   The triangle goes on down forever, in principle.

.

I interpreted this question as meaning what is the probability that Alex will catch the train.  

Strictly interpreted, the question requires the probability that the train is already in the station when Alex arrives, which is how Melody and civonamzuk have interpreted it (in my interpretation Alex could be waiting for some time before the train arrives!).

For the alternative probability I get 11/72 = 0.153.  

(On my diagram imagine a line running from (0,0) to (60, 60).  Alex has to arrive in the band between this line and the blue line, the area of which is a fraction 0.153 of the red box area.)

.

its on like Donkey Kong!

but can mellie write a story much darker than mine?

ill actually catch up in 5 years

I don’t think so TR. Mellie does some heavy duty statistics and other maths for 7th grade. Also, considering nearly everything she writes on here is exemplary in standard expository English writing, including spelling and punctuation, she could easily identify as a senior in high school.

Don’t fret about it though, you’ll catch up in 10 to twenty years.

what the heck is pascals triangle

Chris is correct.  I didn't account for the C(91,1) and C(91,90) values.  

I actually wrote a little program that ran through values of n and, for each n, tried values of k from 1 to n to find those combinations for which C(n,k) = 91.  However, I stopped short of n = 91.  Silly!

. 

this man is your fathers grandson!

You're on!

Hey Heather!!!!

I'm also in the seventh grade! 4months away to year 8

////////////////////////////////////////

youve all been misguided. unlike you guys, Titanium Rome knows how to do this!

-6-8=28

add 8 to both -8 and 28

now its -6=36

add 6 to both sides

now its just 42

overall, x=42 number thingys

ayayay

i think i just conquered some more misguided people. maybe a bit of magic glitter will brighten them up

Haha nice label. 

no! I WANT NUMBER THINGYS! not proportion

Formula:

Delta(change in) y/Delta (change in) x=m

-4-5/4--2=m

-9/6=m

-3/2=m. 

Hopefully this is correct.

You want to create a proportion. 

15/10=x/600

To find x, cross multiply each side. 

So, 15*600=100x

9000=100x

90=x