Answer:
A
Step-by-step explanation:
By definition, all sides of a regular polygon are equal in length. If you know the length of one of the sides, the area is given by the formula:

where s is the side length, n is the number of sides.
In your case, s=20 ft, n=5,so

It would be 12 dollars in US money
Answer:

Step-by-step explanation:
Consider polynomial
If x=-2 is its zero, then you can divide the polynomial
by
and get

If x=-1, then the polynomial
can be rewritten as

The quadratic polynomial has roots

Then the polynomial
has zeros 
Subtracts 150 each time—
950-150=800 and 800-150=650 and so on and so forth. The number sequence only includes 5 numbers so there is no way to tell if there is a tougher solution.
Answer:
Hope this helps. x=12 and y= -10