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Iteru [2.4K]
3 years ago
15

To find how high school students feel about hot lunches, Adam walks to the nearest high school and gives a survey postcard to ev

ery twentieth student that enters the building. He asks the students to mail the postcard in if they choose to participate in the study. Select all sampling methods used. cluster convenience simple random stratified systematic voluntary
Mathematics
2 answers:
tatuchka [14]3 years ago
7 0

Convenience

Systematic

Voluntary



Eddi Din [679]3 years ago
3 0
The surveyor selects the twentieth student who enters the building. The student do not enter the building to be surveyed but for other reasons and the researcher take advantage of that and selects them. This is a form of continence sampling.
 The researcher selects every twentieth student and not any other. Therefore, the sampling is systematic in nature.
Finally, students selected to participate in the survey are free to choose if to participate in he survey or not. Therefore, it is voluntary kind of sampling.

Therefore, the applicable sampling methods are convenience, systematic, and voluntary.
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There are 60 students in Kinsley's grade. 3 of the students are enrolled in health. What
GREYUIT [131]
5% of the kids are in health. I got this from simplifying 3/60 which is 1/20

After that, i set up this equation: 1/20 times x/100

I would then divide 20 and 100 to get 5 and that’s basically what I did
4 0
1 year ago
At the county fair, Darius can purchase 3 candy apples and 4 bags of peanuts for $11.33. He can purchase 9 candy apples and 5 ba
Ksenya-84 [330]
Let c represents the cost of a candy apple and b represents the cost of a bag of peanuts.

Darius can purchase 3 candy apples and 4 bags of peanuts. So his total cost would be 3c + 4b. Darius can buy 3 candy apples and 4 bags of peanuts in $11.33,so we can write the equation as: 

3c + 4b = 11.33   (1)

Darius can purchase 9 candy apples and 5 bags of peanuts. So his total cost would be 9c + 5b. Darius can buy 9 candy apples and 5 bags of peanuts in $23.56,so we can write the equation as: 

9c + 5b = 23.56   (2)

<span>Darius decides to purchase 2 candy apples and 3 bags of peanuts. The total cost in this case will be 2c + 3b. To find this first we need to find the cost of each candy apple and bag of peanuts by solving the above two equations.

Multiplying equation 1 by three and subtracting equation 2 from it, we get:

3(3c + 4b) - (9c + 5b) = 3(11.33) - 23.56

9c + 12b - 9c - 5b = 10.43

7b = 10.43

b = $1.49

Using the value of b in equation 1, we get:

3c + 4(1.49) = 11.33

3c = 5.37

c = $ 1.79

Thus, cost of one candy apple is $1.79 and cost of one bag of peanuts is $1.49.

So, 2c + 3b = 2(1.79) + 3(1.49) = $ 8.05

Therefore, Darius can buy 2 candy apples and 3 bags of peanuts in $8.05</span>
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3 years ago
I attached da picture
Svetach [21]
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7 0
2 years ago
4 ^ (- x) + 5 = 3 ^ x + 4<br><br> A ≈ 3/8<br> B ≈ 7/16<br> C ≈ 1/4<br> D ≈ 5/16
Dafna1 [17]

Answer:

4 ^ (-x) + 5 = 3^ x + 4

Step-by-step explanation

i think its c = 1/4

Pls give brainiest

7 0
1 year ago
Each gallon of shingle stain covers 120 square feet. How many gallons should you buy to cover 658 square feet?
hjlf
You need to divide 658 by 120 because you know one gallon covers 120 square feet.
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