Answer:
18 feet
Step-by-step explanation:
Perimeter=2(l+b)
80=2(w+w+4)
80=2(2w+4)
80=4w+8
80-8=4w
72/4=w
W=18 feet
Answer:
y = 2x
Step-by-step explanation:
We can find the slope
m = (y2-y1)/ (x2-x1)
= (4--4)/(2--2)
= (4+4)/(2+2)
= (8/4)
= 2
We can use the point slope form of the equation
y-y1 = m(x-x1)
y--4 = 2(x--2)
y+4 = 2(x+2)
Distribute the 2
y+4 = 2x+4
Subtract 4 from each side
y+4-4 = 2x+4-4
y = 2x
y+2 = 2x+4
Area of triangle
= h*b/2
x*7/2=17.5
17.5*2/7
=5m
Height=5m