Answer:
The missing length is 12 ft.
Step-by-step explanation:
If you compare the length to the already indentified vertical lengths, you can use 8ft and 4ft, which added together is the missing length.
#4)
cross multiply
2(8x+10) = 4 * 5x
16x + 20 = 20x
4x = 20
x = 5
