Answer:
Hieght=4
hope it helps u...
Step-by-step explanation:
4 ft
The area of a triangle is
A = 1/2 bh
9 = 1/2 (4.5)h
9 =2.25 h
Divide each side by 2.25
9/2.25 = 2.25h/2.25
4 =h
2x=4-2y
x=(4-2y)/3
4x+5y=10
4[(4-2y)/3]+5y=10
(16-8y)/3+5y=10
(16-8y+15y)=10*3
7y=30-16=14
y=2