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grandymaker [24]
3 years ago
5

A teacher polled only the 8th grade students in English classrooms on what their favorite color is. She found that the favorite

color of the school is blue. What kind of sample is this? self-selected sample random sample biased sample systematic sample
Mathematics
2 answers:
Sergeeva-Olga [200]3 years ago
7 0
Self-selected sample
S_A_V [24]3 years ago
6 0

Self selected sample is one in which the researcher puts out a call for volunteers and creates the sample .

In Random sampling each sample has an equal probability of being chosen.

Bias sample is one where sample is collected in such a way that some members of the intended population are less likely to be included than others.

In systematic sampling  a random sample from among a larger population.

Favorite color of the school is blue is systematic sample.



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A snack food manufacturer uses 2,000 kg of peanuts to make two different snack products. Product A contains 30% peanuts by mass
GalinKa [24]

Answer: 1250 kg.

Step-by-step explanation:

Let x = mass of product A.

y=mass of product B

Then , According to the given statement , we have

0.3x+0.7y=2000-------------(1)\\\\x=3y-----------(2)

Put value of x from (2) in (1) ,we get

0.3(3y)+0.7y=2000

0.9y+0.7y=2000

1.6y=2000

y=\dfrac{2000}{1.6}=\dfrac{20000}{16}=1250

Put value of y in (2) ,we get x= 3(1250)=3750 =mass of product A

Therefore, the mass of product B =1250 kg.

8 0
4 years ago
An equation is shown below:
ZanzabumX [31]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

The answer should be <span>The equation can become 6x + 1 = 1 by applying the distributive property.</span>
7 0
3 years ago
Which of the following correctly classifies the number -5 to all of the number sets which it belongs?
neonofarm [45]

Answer:

Real, Rational, Integer,

Step-by-step explanation:

Real: Most numbers are real so they just naturally fall into this category

Rational: -5 can be written as a fraction so it falls here

Integer: An integer is a number that can be positive, negative, or 0. as long as it doesnt have decmal points, it's an integer

Its not a whole number because whole numbers cannot contain a fraction, decimal, or negative value

Hope this helps!

5 0
4 years ago
Steve is standing amongst a crowd that is 30 feet deep and 3 miles long at a parade on both sides of the street. He wants to est
djverab [1.8K]
B. 237,600 people. You would find the Square feet of one side of the street. Which is length times width. 15,840ft (3 miles)x 30 ft. Double the the amount to count for the other side of the street, then divide by 40 and multiply by 10.
3 0
3 years ago
What is the direct variation equation for the table of ordered pairs?
Anastasy [175]
<u><em>Answer:
</em></u>
y = 0.8 x

<u><em>Explanation:
</em></u>
We are given that y is directly proportional to x. This means that as the value of x increases, the value of y would increase and vice versa.

<u>The general equation representing this is:
</u>y = k*x where k is the constant of proportionality

<u>To get k, we will use the given x and y values as follows:
</u>y = k*x
<u>at x = 60 and y = 48:</u>48 = 60*k
k = 0.8
<u>at x = 70 and y = 56:
</u>56 = 70*k
k = 0.8
<u>at x = 80 and y = 64:
</u>64 = 80*k
k = 0.8

From the above, <u>we can confirm</u> that the constant of proportionality (k) is equal to 0.8.
<u>This means that the equation is:
</u>y = 0.8*x

Hope this helps :)
5 0
4 years ago
Read 2 more answers
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