Region B
The solution of two intersecting lines is the point that both share in common. From a point of view, it is the point where the two lines meet. In this case, the point is in quadrant 1, or Region B.
Based on the picture, we know that ED is equal to DB. Therefore:
2 times ED=EB
2(10)=20
EB is 20
The answer is 19.5
You add all the numbers to get 273 and divide by the amount of dots which is 14 to get 19.5
Ax^2+bx+c
if a=1, then
take 1/2 of b and square it
w^2-4w+c
b=-4
-4/2=-2, (-2)^2=4
add that
w^2-4w+4
(w-2)(w-2)
(w-2)^2
to make it into perfect squres, add 4
