Answer:
a = length
b = height(width)
a=3b
2(a+b)=120
2(b+3b)=2(4b)=8b
8b=120
b=15
a=45
length is 45 feet
width is 15 feet
the answer is =-3±/2
Step-by-step explanation:
x = 19
The two angles with measures are supplementary.
6x + 9 + 4x - 19 = 180
10x - 10 = 180
10x = 190
x=-16
y=-20
y=x-4
-20=x-4
(-3,-4)
It's graph D