Complete the chart to find the mean, variance, and standard deviation. Remember to use commas and round numbers to the nearest tenth.

B-R

x

1.45

2.340

x-X

=-357.5

The mean is

2.340

=-62.5

The variance is

3.400

= -2.5

278.5

The standard de 402.5

4.825

77.5563

= 422.5

2X=

x=

(x - x)2 = 310,225.2

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,