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zhuklara [117]
3 years ago
15

A sample of students will be selected from all the students at a high school. Which of the following sampling methods is least l

ikely to produce a representative sample of the students?
From a list of all student names, randomly select 50 names from the list for the sample.
A



Randomly choose five classrooms in the school and use all the students in those classrooms for the sample.
B



Divide the students into the four class years (freshman, sophomore, junior, senior) and randomly select students from each year in proportion to the number of students in each year.
C


From a numbered list of all student names, randomly choose a starting point and then choose every tenth student on the list.
D

From a randomly chosen home basketball game, choose every tenth student who enters the gymnasium.
E
Mathematics
1 answer:
Feliz [49]3 years ago
8 0

Answer:

B seems most logical and fair

Step-by-step explanation:

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What is the period of the parent cosine function, y = cos(x)
tankabanditka [31]

Answer:

2π

Step-by-step explanation:

This is a little something you have to memorize, but you could derive it from the equation pb = 2π. In the parent function, the b value is 1, so the period, p, is equal to 2π/1 or just 2π.

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Write the quadratic equation whose roots are -2 and 1, and whose leading coefficient is 4 .
Kaylis [27]

Answer: the equation is

4x^2 + 4x - 12

Step-by-step explanation:

A quadratic equation is an equation in which the highest power of the unknown is 2.

The general form of a quadratic equation is expressed as

ax^2 + bx + c

Where

a is the leading coefficient

c is a constant

Assuming we want to write the quadratic equation in x, from the information given, the roots which are given are -2 and 1 and the leading coefficient is 4.

Therefore, the linear factors of the quadratic equation will be (x+2) and (x-1)

the equation becomes

(x+2)(x-1)

= x^2 - x +2x - 3

= x^2 + x - 3

Given a leading coefficient of 4, we will multiply the quadratic expression by 4. It becomes

4(x^2 + x - 3)

= 4x^2 + 4x - 12

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Please help out!! Im giving 25 pts!!
gogolik [260]

Answer:

10,11,aquarium

Step-by-step explanation:

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A bin has 382 red, yellow, blue and green balls. It has three times as many red balls as yellow balls, 52 more blue balls than y
Ksivusya [100]

The bin containing 382 red, yellow, blue and green balls have a total of 32 green balls.

Let x represent the number of red balls, y represent the number of yellow balls and z represent the number of green balls.

Since ther is a total of 382 balls, hence:

x + y + z = 382   (1)

There is three times as many red balls as yellow balls:

y = 3x

3x - y = 0    (2)

52 more blue balls than yellow balls, hence:

z = y + 52

- y - z = -52    (3)

Solving equations 1,  2 and 3 gives x = 62, y = 186, z = 134

Hence there are 62 red balls, 186 yellow balls and 134 blue balls

Green balls = 62 - 30 = 32 balls

Find out more at: brainly.com/question/16763389

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For Thanksgiving Break Nykouth and her family is going to visit relatives in Nebraska. Her dad has found a hotel room at the Hil
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Answer:

109n + 35

Step-by-step explanation:

I'm not sure what you are asking because you have no question in there

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