Answer:
0,3,4,-11
Step-by-step explanation:
Ggeasy
we can eliminate the y terms by adding the equations
x-y=11
<u>2x+y=19 +</u>
3x+0y=30
3x=30
divide by 3
x=10
subb ack
x-y=11
10-y=11
minus 10 both sides
-y=1
times -1
y=-1
(x,y)
(10,-1)
The answer for this is a=3
Polygon is a part rectangle:
base= 14 ft
left side = 9 ft
right side = 4 ft
adjacent side to it on the right = 3ft
Area = 2 b h + lw+lw = 25 *2+40+36 = 126 ft²