Answer:
n = 20
Step-by-step explanation:
The number of diagonal that can be drawn in a polygon of n sides is given by :

If the number of diagonals are 230, then put D = 230 in above formula. So,

It is a quadratic equation, the value of n is equal to 20.
It means that for 230 diagonal, there are 20 sides of the polygon.
Answer:
469,225
Step-by-step explanation:
685² = 469,225
I hope this helps!
Answer:
180
Step-by-step explanation:
For each boy you choose, you choose one of the 15 girls.
This is the counting principle.
12 * 15 = 180
Answer: 180
The percent of people with blue towels would be the remaining percent when you add the red and wight towels together.
a.k.a
53% would have blue towels.
Answer:
129
Step-by-step explanation:
278 - 149 = 129