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Anna71 [15]
3 years ago
13

In a certain town 22 of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor t

he measure
Mathematics
2 answers:
IceJOKER [234]3 years ago
7 0

Answer:

4.6

Step-by-step explanation:

Allow me to revise your question and hope it will be the same as the original one:

<em>In a certain town 22% of voters favor a given ballot measure for groups of 21 voters find the variance for the number who favor the measure</em>

<em>a. 1.9 </em>

<em>b. 13 </em>

<em>c. 4.6 </em>

<em>d. 3.6</em>

Here is my answer:

Given:

  • 22% of voters favor a given ballot = 0.22
  • Groups of 21 voters

So the variance is: 21*0.22 = 4.6

We choose B

nasty-shy [4]3 years ago
4 0
What is the equation.
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System of Equations <br> Need help<br> Trig
Yanka [14]

Looks like the system is

\begin{cases}-2x+y+6z=1\\3x+2y+5z=16\\7x+3y-4z=11\end{cases}

We can eliminate y by taking

(3x+2y+5z)-2(-2x+y+6z)=16-2(1)

\implies3x+2y+5z+4x-2y-12z=16-2

\implies7x-7z=14

\implies x-z=2

so that z=x-2, and

(7x+3y-4z)-3(-2x+y+6z)=11-3(1)

\implies7x+3y-4z+6x-3y-18z=11-3

\implies13x-22z=8

Substitute z=x-2 into this last equation and solve for x:

13x-22(x-2)=8

\implies13x-22x+44=8

\implies-9x=-36

\implies x=4

Then

z=x-2

\implies z=4-2

\implies z=2

Plug these values into any one of the original equation to solve for y:

-2x+y+6z=1

\implies-2(4)+y+6(2)=1

\implies-8+y+12=1

\implies y=-3

Hence the solution is x = 4, y = -3, and z = 2.

6 0
4 years ago
Which statement describes the translation from the graph y=|x| to the graph y=|x+3|-4?
Pavel [41]

Answer:

B) shift 3 units left and 4 units down

8 0
3 years ago
6. Select all the expressions that are equivalent to 10-6. 1 a. 1000000 b. 1000000 1 C. 106 d. 108 . 10-2 6 10 e. 10 1 f. 10-10-
zhuklara [117]

N/A

Step-by-step explanation: Just pay attention Haden

7 0
3 years ago
Find the y-intercept of the line that has a slope of -3 and passes through (9,0)
Ann [662]

9514 1404 393

Answer:

  27

Step-by-step explanation:

For point (x, y) and slope m, the y-intercept can be found from the equation ...

  b = y -mx

  b = 0 -(-3)(9) = 27

The y-intercept is +27. The corresponding ordered pair is (0, 27).

7 0
3 years ago
I still need help guys
8_murik_8 [283]

Answer: 399=300+90+9

-45=0+40+5

300+130+14=414

Step-by-step explanation:

Expanded form is a way to write numbers by showing the value of each digit.

4 0
3 years ago
Read 2 more answers
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