All Answers 358087 Answers

Yes , they are equal:

2ab /(b-a)    x  -1/-1    =  -2ab/-(b-a)  =   -2ab/ (a-b)

The fromula changes per figure, here are some figures and some formulas I hope it helps

1)50=-h+10,000

2)50         =-h

   -10,000

   = -9950

3) -9950=-h

4) -9950 = h

     -1

   = 9950    

5) 9950 = h 

a^6b^5    is all you can say without more information.....sorry

4 with 13 zeroes after it      4 0, 000, 000, 000, 000      40 trillion

= (6 + 5 -2) (xyz)  = 9 xyz

Volume of cone = (1/3)*pi*r^2*h.       r = radius,  h = height.

plz help

i think its 167.551608191456

Area = Length x Width  .......so

2/3 =  Length x 1/2    multiply both sides by 2/1

(2/1)(2/3)  = Length

4/3 km   = Length

No prob......

Thanks alot CPhill! :)

Notice that the first person  does 1/2 the job in one hour and the second does 1/4 of the job in one hour.....so......together.......they complete  1/2 + 1/4  = 2/4 + 1/4  = 3/4 of the job in one hour

Now.....all you have to do is to invert this fraction, and it will give you the time that it will take both of them working together to complete the job   =   4/3 hrs.   = 1 + 1/3 hrs   = 1 hr, 20 min

This makes sense....if you can complete 1/2 of a job in one hour.....it will take you the reciprocal of this fraction, time wise, to compllete the whole job = 2/1 hrs  = 2 hrs

Yes.

3

-14

(iv) (b-c)^2+(c-a)^2+(d-b)^2= (a-d)^2

I think you just want to show that this is true........???

a 

b = ar

c = ar^2

d = ar^3

So

(b - c)^2   = (ar - ar^2)^2  = [ar (1 - r)]^2  =  (ar)^2 (1 - r)^2  = (ar)^2 (1 - r)^2

(c - a)^2  =  (ar^2 - a)^2  =  [ a (r^2 - 1)]^2  = (a)^2 (r + 1)^2 (1 - r)^2

(d - b)^2  = ( ar^3 - ar)^2  = [ ar ( r^2 -1)]^2 = (ar)^2 (r + 1)^2 (1 - r)^2

(a - d)^2  = (a - ar^3)^2  = [  a (1 - r^3)]^2 = (a)^2  (1 - r)^2 (  1 + r + r^2)^2

So

(b-c)^2+(c-a)^2+(d-b)^2= (a-d)^2

(ar)^2 (1 - r)^2  + (a)^2 (r + 1)^2 (1 - r)^2 + (ar)^2 (r + 1)^2 (1 - r)^2  = (a)^2  (1 - r)^2 (  1 + r + r^2)^2

Divide through by   a(1 - r)^2

r^2  + (r + 1)^2   + r^2 (1 + r)^2   =  ( 1 + r + r^2) ^2

r^2 + [ r^2 + 2r + 1] + r^2 ( r^2 + 2r + 1) =

2r^2 + 2r + 1  + r^4 + 2r^3 + r^2  =

r^4 + 2r^3 + 3r^2 + 2r + 1 =

This factors as :

( 1 + r + r^2)^2

And this  = the RHS

3a + 9d 2d

3a + 11d (simplified form)

Divide that number by 175 million and the remainder would be the odds out of 100,000,000,000,000,000

1+1=2