ElectricPavlov

OK....that is what I suspected

y=(3x-5) / (x+4)         change the 'y' for 'x' and the 'x's to 'y's then solve for 'y'

x = (3y-5)/(y+4)       Multiply both sides by y+4

x(y+4)  = 3y-5

xy + 4x = 3y- 5

4x+5 = 3y - xy

4x+5 = y(3-x)

(4x+5)/(3-x) = y = f^(-1)(x)

-12 / (-2) = + 6 

1 KILOgram = 1000 GRAMS

1000 grams - 225 grams =  775 grams

He must have started with $50    ....when it DOUBLED to $100 and they deducted the fee ($100) , it would be ZERO.

Density = mass / volume    solving for 'mass'

Density x volume = mass

11,300 kg/m^3  x  volume = mass    BUT in this example mass is in cm^3 ....let's convert THAT to m^3

50 cm^3  x   1m / 100 cm  x  1m / 100cm  x  1m / 100cm    =   50 / 1,000,000 m^3

11300 kg/m^3  x  50 / 1000 000    m^3   =  .565  KILOgram =  565 grams

 5cm x 5cm x 4 cm = 100 cm^3

Density =  mass / volume  =  200 g / 100 cm^3  = 2 gm/cm^3

Did you mean  \(\sqrt[3]{6}\) =  1.817

Subtract '4' from both sides of the equation 

    then multiply both sides by '3'   to find  'u'

Melody is aware and has contacted user 'fake' Cphil   and is working on maybe contacting site ADMIN to delete the user if they persist with this nonsense.

Fv =Pv(1+i)^n      

Fv = Future value  Pv = present value   i = interest (decimal form) per period   n= number of periods

Fv = 600 (1 + .0125)^3  =  L 622.78