All Answers 358516 Answers

0/0  is undefined because it has no particular value.

For example:  6/3  =  2  because 6  = 2 x 3

Using this idea:  0/0  =  4  because  0  = 4 x 0

Also:                  0/0  =  9  because  0  =  9 x 0

And:                   0/0  =  27  because  0  =  27 x 0

So, you can make  0/0  to be any number:  0/0  =  n  because  0  = n x 0  for every number that you replace for n.

1/2    or 0.5

Your writing says '.....take 50 from 40..'    but your equation show  take 40 from 50

Lost 2 gallons in 10 minutes (or 1/6 hr)

2 / (1/6) =  12 gal/hr

7x-7 <=6x-6      Subtract 6x from both sides

x - 7 <= -6          Add 7 to both sides

x <= 1

7x - 7 <= 6x - 6

Add 7 to both sides and then subtract 6 from both sides, then you have:

x=< 1

Some people describe it as "undefined". If you are a physicist and you try to divide by zero, the physicist will say " I'm getting infinties"!. And there you have in a nutshell.

what is 50x75%=50 X (75/100)=50 X .75=37.5

10000 in decimal form?

It is ALREADY in decimal form!!. Maybe you meant in scientific notation:

100,000=1.0 X 10^5

A pair of boot costs $10 more than twice the cost of a pair of shoes. The boots cost $76.50. How much do shoes cost?

Your question doesn't make sense.  

Someone may answer but they will be guessing what you mean.

This is a complex topic.

Perhaps you can give an example.

can you solve this problem? if you fold a piece of paper in half nine times how many sections would there 
 

2^9=512

[sqrt(5) - sqrt(2)] / [sqrt(5) + sqrt(2)]

=0.225148.............etc.

49^x= 7^(2x)

So the question becomes

2x=x^2-15

X^2 -2x -15 = 0

(X-5)(x+3)=0

X=5 or -3

3x^2-2x-2=4    add 2 to both sides

3x^2 - 2x    =   6        divide every term by 3

x^2 - (2/3)x  =   2      take 1/2 of 2/3, square it and add to both sides

x^2  - (2/3)x + 1/9   = 2 + 1/9        factor the left side

( x  - 1/3)^2  =  19/9         take the squareroot of both sides

x - 1/3   = pos/neg sqrt(19)/2       add 1/3    to both sides

x =     pos/neg sqrt(19)   + 1/3

Solve for x over the real numbers:
49^x = 7^(x^2-15)

Take the natural logarithm of both sides and use the identity log(a^b) = b log(a):
2 log(7) x = log(7) (x^2-15)

Expand out terms of the right hand side:
2 log(7) x = log(7) x^2-15 log(7)

Subtract x^2 log(7)-15 log(7) from both sides:
-(log(7) x^2)+2 log(7) x+15 log(7) = 0

The left hand side factors into a product with four terms:
-(log(7) (x-5) (x+3)) = 0

Divide both sides by -log(7):
(x-5) (x+3) = 0

Split into two equations:
x-5 = 0 or x+3 = 0

Add 5 to both sides:
x = 5 or x+3 = 0

Subtract 3 from both sides:
Answer: |  x = 5         or x = -3
 

The answer is: y=2x-5