Answer:
k = -2
Step-by-step explanation:
If 
Then

So

From this follows k = -2
Answer:
20 sides
We know that if we find the size of an exterior angle for the given regular polygon whose exterior angle is 18∘, we can find the number of sides. Where, n is the number of sides. Therefore, there are 20 sides in the given regular polygon whose exterior angle is 168∘.
Answer:
7 students
Step-by-step explanation:
1+2+4=7students
Wow I don't get it either but my guess would be 9,6...sorry....
An item is regularly priced at $30. It is on sale for 20% off the regular price. How much in dollars) is discounted from the regular price?