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Excellent !!

Do you have some more riddles for us Riddler?

Riddler is having the same trouble as Saseflower.

They both say the box with the triangle for editing etc does not (always? ) exist on their posts.

So that means they cannot edit.  

Riddler's thread.

http://web2.0calc.com/questions/points_1#r7

Mmm that is odd.  

Saseflower members said that happens to her sometimes too...

You are logged in arn't you?

Mmm what a riddle......

I'll record your post in the problems for admin thread.  

http://web2.0calc.com/questions/here-is-an-opportunity-for-you-to-express-your-views-of-the-new-forum

I meant find the sum of the equation, sorry

The sum would be infinity     :D

x^2-6x+5/x^2+4x-5

do you mean     (x^2-6x+5)/(x^2+4x-5)  ?

brackets are important because otherwise we have to guess what you mean ://

For starters, I suggest that you join up :)

I do.  

David Tennant was the  best Dr. Who  :)

although Matt Smith was good too    

Hi Olivia,

Thanks guests, 

I just want to discuss this a bit more  :))

Factor         \(x^2-8x-48\)

Like guest 2 said you need 

2 numbers that multipy to -48 and add to -8

Think about the multiply first.  

They multiply to a negative number so one must be negative and one must be positive.

Now they add to a negative SO the 'bigger' one is negative.

Mmm

So what multiplies to -48  where the 'bigger' one is negative.

possibilities are  

1 and -48,      

2,and -24,    

 3 and -16,    

4 and -12,      

6 and -8

which of these add to -8?     4 and -12  that the only one. 

so

x^2-8x-48 = (x+4)(x-12)             

What you can also do is cross multiply.

40/100=x/130

Multiply each numerator by the opposite denominator...

100x=5200

Simplify...

x=52

There you have it! You can also do what the Guest did by multiplying by .40 because it equals 40%.

No operation when a number is next to parentheses just means that you should multiply.

6*(/6x)

There you go!

.40 X 130 = 52

6(5/6x)

this should be read like this:

6 X (5/6x).

t³ + tu + u²

        t

Find the LCM of 15y^6 and 75y^8

=75 y^8

what is 11.1% in fraction and decimal form?

11.1%=11.1/100=.111 decimal form,

.111 X1000/1000=111/1000 expressed as a fraction.

= 37/100

So we can tell how many candles to put on your birthday cake....

Factor the following:
x^2-8 x-48

The factors of -48 that sum to -8 are 4 and -12. So, x^2-8 x-48 = (x+4) (x-12):
Answer:  (x+4) (x-12)
 

7x3=21

x-12 ) ( x +4

Just multiply all of the Numerators (top numbers)    and multiply all of the Denomintors (bottom numbers) to get

42/336   then you can simplify it if you wish to 1/8

Another way:

1   6   7               1

_   _   _       =      _  

6   7   8               8         When you 'strike out'   the 6s and the 7s from the top and bottoms

100^500 = (10^2)^500 = 10^1000

1000^300 = (10^3)^300 = 10^900

Which is bigger?    100^500

That's just sick(s), sick(s), sick(s)........!

what is x to the power of 5 minus x to the power of 3

x^5 - x^3=

Simplify the following:
x^5-x^3

Factor x^3 out of x^5-x^3:
x^3 (x^2-1)

x^2-1 = x^2-1^2:
x^3 (x^2-1^2)

Factor the difference of two squares. x^2-1^2 = (x-1) (x+1):
Answer: | | x^3 (x-1) (x+1)