A contractor records the areas, in square feet, of several houses in a neighborhood to determine data about the neighborhood. Wh
2 answers:
Answer:
Step-by-step explanation:
Given that a contractor records the areas, in square feet, of several houses in a neighborhood to determine data about the neighborhood.
Let X1, X2,...Xn be the data set
We find mean of this by the formula sum/n
Mean =
Now variance is calculated as sum of squares of deviations of each entry from this mean.
Var(x) =
Standard deviation = square root of variance
Thus first mean, then variance then sd deviation is calculated.
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Given parameters:
Midpoint of AB = M(3, -1)
Coordinates of A = (5,1)
Unknown:
Coordinates of B = ?
Solution:
To find the mid point of any line, we use the expression below;
and
where and
= coordinates of the mid points = 3 and -1
x₁ = 5 and y₁ = 1
x₂ = ? and y₂ = ?
Now let us input the variables and solve,
3 = and -1 =
5 + x₂ = 6 -2 = 1 + y₂
x₂ = 1 y₂ = -2 -1 = -3
The coordinates of B = 1, -3