Answer:
The coordinates of the fourth vertex of the rectangle is 
Step-by-step explanation:
Let

using a graphing tool
Plot the vertices of the rectangle
The coordinates of point D will be the intersection point of the line parallel to AC that passes through the point B with the line parallel to AB that passes through the point C
The intersection point is 
see the attached figure
You are trying to solve for y (get y by itself)
9y + 10 = -8 Subtract 10 on both sides
9y + 10 - 10 = -8 - 10
9y = -18 Divide 9 on both sides
y = -2
Answer:
parmak izlerimiz birbirinden farklıdır.
bireysel farklılıklara saygı duyulması insanlar birbirlerini asalanaya başlar ülkede iç savaş çıkabilir mesela
For A, you take 70% of 421,000 and subtract that from 421,000. You should solve like this: 421,000 - (0.7 x 421,000).
For B, you take 40% of 31.50 and add it to 31.50. (31.50 + (31.50 x 0.4).
This is all I can give for now. Glad to help you!