ElectricPavlov

m1    negative number  slope  may be a fraction of -1 ...depends on the scales used

m2 = 0   slope = 0      equation of the form  y= b2

m3    positive number slope  probably greater than or equal to 1

b1     y -axis intercept positive   greater than b2 or b3

b2     y - axis intercept positive  less than b1   greater than b3

b3     y-axis intercept  negative   less than b1  or b2

1c = 2g

or    c = 2g

3g=5f     (f= chickens)

g=5/3f     Substitute into the first equation

c = 2 (5/3 f)       now you have 6 cows so multiply both sides by 6

6c = (6)(2)(5/3 f) = 60/3 f = 20 f   

6 cows = 20 chickens

11.     The smallest I can find ...by trial and error    is    4  5   6

           perimeter = 15

9.  Interior angles of a regular polyhedron total   (n-2)(180)

      for an octagon    (8-2)(180) = 1080    there are 8 interior angles so each is 1080/8 = 135 degrees

     The sides of the SQUARE form isocoles triangles of sides 4, 4   and 'x' (the side of the square) with an included 135 degree angle beteen the 4 and 4 sides

   The other two angles are   (180-135)/2 = 22.5 degrees

 Use the law of sines to find 'x'

sin 135 /x  = sin22.5  / 4    results in square side length of 7.39     

 Square Area = 7.39 x 7.39 =54.63 units^2 

Thanx for the confirmation !  

Here we go....my stab at it....

5 ways to choose a vowel    a e i o u

   times    21c2

5 x 21c2 = 5 x 210 = 1050 ways

#5   Three sides are 2x2    so 3 x 2 x2  = 12 cm^2

        the ends are equalateral triangles with sides= 2    area =  2 sides x  sqrt3/4 x (2^2) =3.464

3.464 + 12 = 15 . 464  cm^2

or    12 + 2 sqrt(3)     cm^2        

#4      x miles/ (40 m/g)  +   x miles/(30 m/g) =  2x miles/ ?m/g

divide by x      1/40 +1/30 = 2/?      solve for ? = 34.3 m/g

#3    D=1  A=9 B=4  C=5

...but you have to select from the multiple choice answers given...hence the correct answer is - pi/6