<span>6x=480 ft
x=80 ft.
Area = x^2 = 80^2 = 6400 sq. ft.</span>
Answer:

Step-by-step explanation:
Hello
let's assume that we are looking for x >=0

Let's assume that we are looking for x>=0
so the correct answer is 5
Answer:
42.5 units²
Explenation:
The area of the square on the left is 5×5=25.
At the top you do 12-5=7 to find the length of the tringle.
Than it is 7×5=35 than this divided by two, so 17.5.
You add both areas 25+17.5=42.5
The answer is B. Since the graph increases by 4 on the y-axis as <em>x</em> increases by 1, the constant of proportionality is 4.
-44.09 i dont understand why we must have 20 characters but OK