ElectricPavlov

If I read you r questin correctly     50 blue beads is 1/3 of the bue beads   so , to start there was 150 blue beads

Blue beads represented 60 % of the original number of beads (because red represented 40%

150 /n  x 100% = 60     n= 250 beads originally

now if she loses 50 beads   she has      200 left

x = stock price at purchase

      down 20 %    means 80% left     .8x    after 20% loss

          then up 30%          (1.3)(.8x) = final value    =1.04 x      final value is UP 4%

Not POSITIVE, but pretty sure the minimum sampling rate would be    2   x 12 khz = 24 000/sec

put into 512 levels       24000 x 512 = 12.288 Mbs

Helen drove   3.2 hrs   *   x  m/hr

Anne drove   2.8 hrs * ( x-10) m/hr     these should sum to 332

3.2 x   + 2.8 (x-10) = 332       solve for'x'. Helen's speed       then  x-10 = Anne's speed

The 'off' portion will be    20%  *  $ 35.99   =  .20 (35.99) = ......

The remainder would be    80% * $ 35.99 =   .8 (35.99) = ........

 p = pennies        1p  = value of pennies

n = nickles..... this equals  3p  ( this is given in the Q)  ....value of nickles =  5 (3p) 

                 summed thes equal 1568

1p      +      5(3p)        = 1568

16p = 1568                       solve for p, the number of pennies      then  # nickles = 3 * p

   126 students   *   2 slices / student   *   1 pizza/ 8 slices    =  31.5 ~~ 32 pizzas    

                                                     See how things 'canel out' and you are left with only 'pizzas' ?

                                                               THAT is often the easy way to 'figure' these types of problems  !  

52 students total

   soccer has   'x' students   and  f has   x+12  students  ( f has 12 more than s    <------ given in the equation)

       they sum to 52

x       +    x+12     = 52     solve for 'x' <--- the number of soccer students     then f = x + 12    the number of field hockey students

If you need more help than what has been given, you are in a class too far above you current knowledge level and need some remedial work to get you up to speed........please let someone know this. 

  You have to finish the math ....   and YOU have to select one of the letters !