Answer:
(8/2)(0.10)^2(0.90)^6
Step-by-step explanation:
Khan
Solution :
Given :
X = homicide rate (homicides per 100,00 population)
n = 12 = metropolitan areas
Area X (homicides per 100,000 population)
Mesa, AZ 4.1
Seattle, WA 3.8
Portland, OR (tie) 3.4
New York, NY(tie) 3.4
Virginia beach, VA 3.3
San Jose, CA 3.1
EI, Paso, TX 2.6
Austin, TX 2.6
San Diago, CA 2.4
Suffolk County 2.2
Montgomery, MD 2.0
Fairfax, VA 1.7
Therefore, the mean of X = 

= 2.9
Therefore, the mean of homicide rater in the 12 metropolitan areas is 2.9 homicide per 100,000 population.
2/3 times 12 is 8 so I think that your answer would be 8.
Answer:
1
Step-by-step explanation:
So for this type of problem we use the formula
with each variable (besides m which is slope) representing a different coordinate. (e.g. -3 could be
in this case.) First, let's define which is which:
(3,2): 
(-2,-3): 
Now we need to replace the variables with their known values: 
Next, let's do the subtraction to simplify: 
And we can complete the division (all fractions are division!) to simplify even further: 
Therefore, the slope of the line passing through the points (3,2) and (-2,-3) is 1.