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Nina [5.8K]
4 years ago
7

A random sample was taken to determine whether students from a certain classroom prefer to shop at Store A, Store B, or Store C.

Which of the following would represent a random sample?
selecting all the students that have a last name that begins with R
selecting all the girls
putting all the names in a hat and selecting six students
putting all the names in alphabetical order and selecting every fourth student
Mathematics
2 answers:
steposvetlana [31]4 years ago
8 0
Putting all the names in a hat and selecting six students because the rest would not have been random because you know who you picked just by looking but if u put names in a hat you don't know who you picked.
g100num [7]4 years ago
5 0
Putting the names in a hat and selecting six students
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Write the equation of a line passing through (-4.3) and perpendicular to -6x + 4y =-12.
sergij07 [2.7K]

Answer:

y=-2/3*x+1/3

Step-by-step explanation:

-6x+4y=-12

put into y=mx+b line equation

4y=6x-12

y=(6/4)x-(12/4)

y=(3/2)x-4

slope is 3/2

to find perpendiular line slope take the negative inverse.

-(2/3) = slope of perpendicular line

use line equation and solve for y-intercept (b)

3=(-2/3)*(-4)+b

3=8/3+b

b= 9/3-8/3 = 1/3 : 3 = 9/3 to allow for subrtaction of fractions.

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3 years ago
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GrogVix [38]

Answer:

(\frac{dy}{dt})^2=sin^2t

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If y is a solution of given DE then it satisfied the DE.

Differentiate w.r.t t

\frac{dy}{dt}=-sint

Using the formula

\frac{d(cosx)}{dx}=-sinx

LHS:(\frac{dy}{dt})^2=(-sint)^2=sin^2t

RHS

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By using the formula

sin^2t=1-cos^2t

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Hence, y is a solution of given DE

(\frac{dy}{dt})^2=sin^2t

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3 years ago
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Step-by-step explanation:

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