Answer: The answer is 20
Step-by-step explanation: If all interior angles are 162o , polygon has 20 sides.
Answer:

Step-by-step explanation:
The number exceeds 21 or is greater than 21.
‘
’ represents greater than.
Let the number be
.

We can see the sequence goes by decreasing 9 on each number
so the numbers are
2, -7, -16, -25, -34, -43, -52, -61, -70
so adding all these numbers we get
2-7-16-25-34-43-52-61-70
= -306
hope this helped
Answer:
Zero real roots:
f(x) = x^2-x+1
f(x) = x^2+2x+3
One real root:
Two real roots:
f(x)=x^2+2x+1
f(x)=x^2-3x+2
Step-by-step explanation:
These were determined by using the quadratic formula.