Answer:
900°
Step-by-step explanation:
The sum of interior angles of a polygon with
sides is given by:
Sum = 
Here, <u>the polygon has 7 sides</u>, so
. Plugging this into the formula gives us:
Sum = 
So the answer is the first choice, 900°.
Do you have a specific question we could solve?
Can you make that more dicriptive
Answer:

Step-by-step explanation:
A standard polynomial in factored form is given by:

Where <em>p</em> and <em>q</em> are the zeros.
We want to find a third-degree polynomial with zeros <em>x</em> = 2 and <em>x </em>= -8i and equals 320 when <em>x </em>= 4.
First, by the Complex Root Theorem, if <em>x</em> = -8i is a root, then <em>x </em>= 8i must also be a root.
Therefore, we acquire:

Simplify:

Expand the second and third factors:

Hence, our function is now:

It equals 320 when <em>x</em> = 4. Therefore:

Solve for <em>a</em>. Evaluate:

So:

Our third-degree polynomial equation is:
