ElectricPavlov

(10+x)/2   * 4  = 38

x = 9 units

Rememger   sin^ + cos^2 =1        cos will be negative for angles > 90 degrees    (and less than 270)

  1-  25/36 = cos ^2      cos = - sqrt11/6 

tan = sin/cos     <====== you can finish..... 

It will be the same x distance on the OTHER side of the vertex    12,0

Do you know how to sum an arithmetic sequence ?

   d = 2   n = 17    a1=20

c+ a = 207      or     c = 207-a

c+12 = 1/2 (a-12)     sub in the red equation

207-a + 12 = 1/2 a - 6

225 = 1 1/2 a

a = 150 

k + d = 200       or   k= 200 - d

Then     k - 2/7 k = 1/4   (d + 2/7 k)

               5/7 k - 2/28 k = 1/4 d

               18/28 k = 1/4 d                 sub in the red equation

               18/28 (200 - d) = 1/4 d

                   d = 144

27 pounds = 12.25 kg

12.25 kg * 5 mg/kg = __________ mg

  cos 243        -sin 243

-sin243          -cos 243                  Rotation is 242.928 clockwise    ( I rounded to 243 degrees) 

First position     4    choices

second              5 choices

third                   5 choices

fourth                5 choices

5th position       4 choices                    4² x 5³  = __________ words 

d = 3   

n = terms = 35         1 + 34d = 103

Arithmetic sequence sum =  n/2 (2a₁ +(n-1)d) = 1820