ElectricPavlov

With vertex at 0,0 and including point   12, -18   it obviously opens downward (dome shaped)

Vertex form parabola

y = a (x-0)^2  + 0

y = a x^2        sub in   12 , -18

-18 = a (12^2)

            a = -18/144 = - 1/8

y = -1/8 x^2

Initially there is 5 R out of total  13

5/13   choose a repub

now there is   4 out of 12 R left

4 /12    choose a R

now there is   3 outof 11 R left

3/11 choose R

5/13 * 4/12 * 3/11  = ............

Re-arrange into   y = mx + b form   where m = slope

y = 7/3 x -7       slope = 7/3

Circumference of a round pizza = pi * d  

     this pizza circumference =    6 pi   inches      ( or is that 6 'pie' ?   Haha)

              = 18.85 in

EACH time you have a 5 out of 10 chance of picking a striper

  5/10 * 5/10 =

   1/2  * 1/2 =   1/4

There are 180^o  in the sum of internal triangle angles

   isosceles has two angle =

      65 + 65 + a = 180     solve for  a^o

(1 - 1/2 - 1/5 )/(3)                the '3' represents  C D and E

(10/10 - 5/10 - 2/10)/3

   3/10  / 3  =  3/30 = 1/10  paid by each of C D and E

Right triangle       sin of an angle = opposites side/ hypotenuse

    so the sin 23 = AC/29

then    29 sin 23^o = AC     (use a calculator)

Look at the graph high point     maximum point     y = ~ 290 crates/hr   with 4 workers (the 'x' value)

y = -2x+10   is a line in y = mx+b form where   m = slope     = -2

   parallel line will have same slope....so only the first choice is one that has -2 slope

      but as a check , put in x = -6  and y = 4 to see if it is true !