Answer:
<em>180/7 deg and 1080/7 deg</em>
Step-by-step explanation:
The measures of two supplementary angles add to 180 degrees.
One angle measures x.
The supplement measures 6x.
The sum of the measures is 180 deg.
x + 6x = 180
7x = 180
x = 180/7
6x = 1080/7
Answer:
x = -1
y = 4
Step-by-step explanation:
Solving system of linear equations by elimination method.
8x + 3y = 4 ---------------(I)
2x + y = 2 --------------(II)
Multiply the second equation by (-3) and then add them.Thus y will be eliminated and we will obtain the value of 'x'.
(I) 8x + 3y = 4
(II)*(-3) <u> -6x - 3y = -6 </u> {Now add}
2x = -2
x = -2/2
Plugin x = (-1) in any one of the equations. Here I have chosen equation (II)
2*(-1) + y = 2
-2 + y = 2
y = 2 + 2
Answer:
Answer is displayed below in the picture.
If I understood your problem, you want to calculate the sum of the squared deviations from the sample. If so the formula of the St. Deviation is:
₋
s =√[Σ(xi - x)²/(n-1)], with n = sample size
₋
s² =Σ(xi - x)²/(n-1)
4² = Σ(xi - x)²/(20-1) = Σ(xi - x)²/(20-1)
16 = Σ(xi - x)²/(19)
and Σ(xi - x)² = (16).(19) = 304
Answer:f
Step-by-step explanation:
G