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Evgen [1.6K]
3 years ago
7

A statistical question has answers with _______________.

Mathematics
1 answer:
levacccp [35]3 years ago
8 0

Answer:

d variability

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Evaluate.<br> 8(19−6⋅2)<br> Enter your answer in the box.
Molodets [167]

Answer:

102.4

Step-by-step explanation:

Open the bracket

19-6.2=12.8

8(12.8)

8*12.8=102.4

5 0
3 years ago
Please help, the question below
Licemer1 [7]

Answer:

\sf R=\left(3, -\dfrac{5}{4}\right)

Step-by-step explanation:

Given:

  • P = (1, 5)
  • Q = (-2, 3)
  • R = (a, b)
  • R lies on line x = 3
  • PR = QR

If point R lies on the line x = 3, then the x-value of point R is 3.

⇒ a = 3

<u />

<u>Distance between two points</u>

\sf d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

(where (x₁, y₁) and (x₂, y₂) are the two points)

Use the <u>distance formula</u> to derive equations for PR and QR.

Let (x₁, y₁) = P = (1, 5)

Let (x₂, y₂) = R = (3, b)

\begin{aligned} \sf PR & =\sf \sqrt{(3-1)^2+(b-5)^2}\\ & = \sf \sqrt{4+(b-5)^2} \end{aligned}

Let (x₁, y₁) = Q = (-2, 3)

Let (x₂, y₂) = R = (3, b)

\begin{aligned} \sf QR & =\sf \sqrt{(3-(-2))^2+(b-3)^2}\\ & = \sf \sqrt{25+(b-3)^2} \end{aligned}

As PR = QR, equate the derived equations and solve for b:

\begin{aligned} \sf PR & = \sf QR \\\sf \sqrt{4+(b-5)^2} & = \sf \sqrt{25+(b-3)^2}\\\sf 4+(b-5)^2 & = \sf 25+(b-3)^2\\\sf 4+b^2-10b+25 & = \sf 25 + b^2-6b+9\\\sf b^2-10b+29 & = \sf b^2 -6b +34\\\sf -10b+29 & = \sf -6b + 34\\\sf -4b & = \sf 5\\\sf b & = -\dfrac{5}{4}\end{aligned}

Substitute the found values of a and b to find the coordinates of R:

\sf R=(a,b)=\left(3, -\dfrac{5}{4}\right)

Learn more about the distance formula here:

brainly.com/question/28144723

8 0
2 years ago
Read 2 more answers
At one university, the students are given z-scores at the end of the each semester, rather than the traditional gpas. the mean a
vovikov84 [41]
 <span>a) 
2=(x-2.7)/.5 
(2)(.5) = x-2.7 
1=x-2.7 
x=3.7 

-2.5=(x-2.7)/.5 
(-2.5)(.5) = x-2.7 
-1.25 =x-2.7 
x=2.7-1.25 = 1.45 

b) 
95% of the students' score lie within 2 standard deviation of the mean. Therefore, the top 2.5% corresponds to a z value of 2. 
The limits are (2, infinity) --- top 2.5 %</span>
3 0
4 years ago
A line passes through (4, 5) and (8, 9). Which equation best represents the line?
kramer
The correct answer is y= x+1

5 0
4 years ago
Read 2 more answers
3k+15=66<br> k=-7;k=17;k=27
mash [69]
3k + 15 = 66
3k = 66 - 15
3k = 51
k = 51/3
k = 17
8 0
3 years ago
Read 2 more answers
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