Answer:
7
Step-by-step explanation:
i took the quiz
43-7= 36
Range is highest number minus smallest number
x=6,y=0
2x+y=12
3x-y=18
5x=30
x=6
6(3)-y=18
18-y=18
y=0
4 ft
Area = 30 square ft
base = 7.5 ft