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.
7+3 = 10 total marbles
1st pick = 7/10 for a red one
2nd pick = 6/9 reduces to 2/3 for a red one
3rd pick = 3/8 for a white one
7/10 x 2/3 =14/30 reduces to 7/15
7/15 x 3/8 = 21/120 reduces to 7/40
probability = 7/40
No, he put one up there every 10 minutes, meaning he is going at a consistent rate. No matter what hour he checks, the result will be the same.
Answer:
w=12
l=20
Step-by-step explanation:
The area can be found using the following equation:

Given the information provided, we are also told the following:

Therefore, we can plug in our length and our area:

We can solve by using the quadratic formula.

w=12, so w+8=20.