ElectricPavlov

Treat it as a sideways parabola

vertex form      x = a (y+1)^2 + 5

  sub in one of the points on the graph to find   a   = -1/4

so you have    x = -1/4 (y+1)^2 + 5        now solve the equation for y     to complete your mission !

Sorry....just saw Melody's post....here is the original Q:

Yeppers....THAT is much easier!   

Take   make   sake   fake   male   pale   bale   rate   sate  mate     .....  there are many more choices !

s = still water speed       41 2/3 m/min = 2.5 km hr

s+2.5 = downstream speed       for   9 km

s- 2.5 = upstream speed           for  12 km      

12 / (s-2.5)  + 9 / ( s+ 2.5) = 8   solve for   's'               can you take it from here?

biggest common factor of   -8   12    -2      is   2

  biggest common factor of x^2   x^4   x^2   is x^2

   do similar for y and z

2x^2  y  z^3    ( -4y^3      +     6x^2   -     z^2 )       

radius 1  = 5         height = h

radius 2 =  9 m     height = 9/5 h

volume 1 = 12 tons/volume

1/3 pi 5^2 h = 12      remove the constants     25h = 12  tons     h = 12/25

1/3 pi 9^2 (9/5)h =                                          81(9/5)h = ?       81* 9/5 * 12/25 = 69.98=~~70 tons 

   (not positive of this answer!)

Here s my take on it :

f( ? ) is defined only from  -8 thru 4     so the ? has to equate to this interval

f(2x-1)     must fit in the interval      2x-1 must not go outside of the interval

    so  2x-1 = - 8     means x = - 3.5

           2x-1 = 4     means   x = 2.5

so as far as I can say (I could be wrong)    the domain of g(x) = [-3.5,2.5]

   BUT four aces would be one card from each suit.....so I think you have to correct for that ...??