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geniusboy [140]
4 years ago
14

What is the variance? What is the standard deviation, rounded to the nearest whole number?

Mathematics
1 answer:
Dmitry [639]4 years ago
8 0

Answer:

What is the variance? 84000

 What is the standard deviation, rounded to the nearest whole number? 290

5 stars if this helped  

Step-by-step explanation:

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The quadrilateral ABCD on a coordinate plane has the following characteristics.
kirza4 [7]

Answer with explanation:

Property of Quadrilateral A B CD

⇒Equation of Line AD is, y= -3 x.

⇒Equation of Line BC is, y= -3 x +11

Coordinates of CD = C(2,5) and D(-1,3)

Equation of line CD will be

  \frac{y-5}{x-2}=\frac{3-5}{-1-2}\\\\-3 \times (y-5)=-2\times (x-2)\\\\-3 y +15=-2 x +4\\\\2 x -3 y +11=0

Equation of line AB will be, which is parallel to CD, as opposite sides of parallelogram are parallel and equal,is equal to

    2 x -3 y + k=0

Because when lines are parallel their slopes are equal.

→→Equation of line AD is , y= - 3 x.

Coordinates of point A can be calculated by

→2 x -3 × (-3 x ) +k=0

→2 x +9 x +k=0

\rightarrow x=\frac{-k}{11}\\\\\rightarrow y=\frac{3k}{11}

→→→Similarly, Coordinate of point D can be calculated by solving these two lines:

   y = -3 x + 11

  2 x -3 y + k=0

→2 x -3 × (-3 x +11) +k=0

→2 x +9 x -33 +k=0

→11 x =33 -k

x=\frac{33-k}{11}

y=-3 \times \frac{33-k}{11}+11\\\\y=\frac{-99+3 k+121}{11}\\\\y=\frac{22+3 k}{11}

→→Coordinates of A is (\frac{-k}{11},\frac{3k}{11})

Coordinates of Point D is (\frac{33-k}{11},\frac{22+3k}{11}).

you, can get infinite number of ordered pairs, for different value of k.

For, k=0 ,

A= (0,0)

D=(3,2)

3 0
3 years ago
Please help, this is honors geometry, I need this done as soon as possible
harkovskaia [24]

Answer:

See Explanation

Step-by-step explanation:

Since both the arcs centered at A and B are drawn as radius AB.

Therefore, AB = BC = AC

So, triangle ABC will be an equilateral triangle.

Since, AB = 5 CM

THEREFORE,

AC = 5 CM

BC = 5CM

Measure of each angle of equilateral triangle is 60°

Therefore,

Angle A = 60°

Angle B = 60°

Angle C = 60°

6 0
3 years ago
HELPPPP FAST PLSSS n thxxx
vova2212 [387]

Answer:

D

Step-by-step explanation:

\begin{pmatrix}3\cdot \:6&3\cdot \:6&3\cdot \:4\\ 3\cdot \:7&3\left(-4\right)&3\cdot \:4\\ 3\left(-6\right)&3\cdot \:9&3\left(-3\right)\end{pmatrix}+ \begin{pmatrix}9\cdot \:1&9\cdot \:5&9\left(-8\right)\\ 9\cdot \:9&9\left(-5\right)&9\left(-8\right)\\ 9\cdot \:9&9\left(-5\right)&9\cdot \:2\end{pmatrix}\\\\=\begin{pmatrix}18&18&12\\ 21&-12&12\\ -18&27&-9\end{pmatrix}+\begin{pmatrix}9&45&-72\\ 81&-45&-72\\ 81&-45&18\end{pmatrix} \\\\\\=\begin{pmatrix}27&63&-60\\ 102&-57&-60\\ 63&-18&9\end{pmatrix}

4 0
3 years ago
the three expressions, sin-1, cos-1, and tan-1 are called _____ trig functions and are used to find the measure of the acute ang
geniusboy [140]

Answer:

Inverse.

Step-by-step explanation:

8 0
4 years ago
In a class of 30 students, 13 of them are boys.
Grace [21]

56%

subtract 13 from 30, and you get 17. Then you need to divide 17 and 30

8 0
2 years ago
Read 2 more answers
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