Answer:
or 
Step-by-step explanation:
Using the distance formula:

Hope this helps!
Can you try rewording this question?
Answer:
20% decrease
Step-by-step explanation:
2516/3270 = 0.8 or 80%
This means 80% percent of people showed up again from last year
100-80 = 20
So 20% decrease
Answer:
Step-by-step explanation:
2[n+(n+0.6)]=2[2n+(n+0.1)]
2n+0.6=3n+0.1
3n-2n=0.6-0.1
n=0.5
perimeter=2[2n+0.6]=2[2×0.5+0.6]=2×1.6=3.2
Root: (-1, 0)
vertical intercept: (0, 3)