Answer:
57 dollars
Step-by-step explanation:
Starts off at 7 ends at114688, subtract them, 114681. Now there are 8 terms so subtract 1 because you're starting from the beginning, that leaves 7. Now divide 114681/7=16,383 difference per point,
Now 1st pt is 7
2nd is 16390
3rd is 32773
4th is 49156
5th is 65539
6th is 81922
7th is 98305
8th is 114688
Now add these= 458780
Answer:

Step-by-step explanation:
As per the statement:
Quinton bought x number of shares for p dollars and paid a 1% commission
⇒He brought = 
It is also given that he sold the stock for y dollars and paid a flat fee of $7.
⇒He sold = 
then;
Net proceed is given as:

Therefore, quintons net proceeds algebraically is 
the first option is the correct one
7a)

If n is the amount of sides then there's 38 sides in a polygon with 665 diagonals
7b)
We do the same as 7a) but with 406. We get that
and
. A polygon cant have 30.04 sides