7. the formula for octagon is a=2(1+radical2)s^2
s=4
a=about 77.25
8.
Answer:

Step-by-step explanation:
n is doubled: 2n
y added: 2n + y
divided by 2: n + 
n subtracted -> final resutl: 
Answer:
Step-by-step explanation:
you find r by the nearest integer of the slope to find the answer
Answer:
4 apples/ second
28800 apples in 2 hours
Step-by-step explanation:
20 apples / 5 seconds
Divide the top and bottom by 5
4 apples/ second
A few hours is 2 or 3
There are 3600 seconds in 1 hour
4 apples/ second * 3600 seconds / 1 hour = 14400 apples / hour
14400 apples/ hour
14400apples / hour * 2 hours
28800 apples in 2 hours
7 - N (replace N with 34)
7 - 34
- 27
The answer is - 27