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madam [21]
3 years ago
9

Marcus wants to know if students at his school like to sing in the shower. He polled 40 students who were not part of the school

choir. He found that 11 of the surveyed students enjoy singing in the shower. Is there a sampling bias in the situation above? A. No. Marcus selected a random, unbiased sample for his study. B. Yes. Marcus created bias by only polling 40 students. C. Yes. Marcus created bias by excluding students who are in the choir. D. There is not enough information to determine if Marcus selected a biased sample.
Mathematics
1 answer:
telo118 [61]3 years ago
5 0

Answer:

C

Step-by-step explanation:

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2y + 9 = 4 pls aswer the question pls pls​
Aleonysh [2.5K]

Step-by-step explanation:

2y+9= 4

2y=-5

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3 0
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for every 5 tacos,julianna uses 2 cups of shredded cheese. complete the table to show the relationships between the number of ta
jok3333 [9.3K]

For 5 taccos 2 cups cheese is needed.

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\begin{gathered} As\text{ 5 taccos=2cup cheese} \\ 1\text{ tacco=}\frac{2}{5}\text{cup cheese} \\ As\text{5 taccos=2cup cheese} \\ 1\text{ cup cheese=}\frac{5}{2}\text{taccos} \\ So\text{ 10 tacco=10}\ast\frac{2}{5}\text{cup cheese=2}\cdot2=4\text{cups} \\ 10\text{ cup cheese =10}\ast\frac{5}{2}\text{tacco}=5\ast5=25tac\cos  \end{gathered}35\text{ taccos}=35\ast\frac{2}{5}=7\cdot2=14\text{ cup cheese}24\text{ cup cheese=}24\ast\frac{5}{2}=12\ast5=60tac\cos

So to convert taccos to cups of cheese multiply by 2/5 and from cups of cheese to taccos multiply by 5/2.

4 0
1 year ago
You and your best friend have decided to go out Friday night to spend the money you received from having a great report card. Th
slega [8]

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Step-by-step explanation: X=-4y+4

3 0
3 years ago
When factored completely, the expression p^4 - 81 is equivalent to
Paha777 [63]
P⁴ - 81
p⁴ + 9p² - 9p² - 81
p²(p²) + p²(9) - 9(p²) - 9(9)
p²(p² + 9) - 9(p² + 9)
(p² - 9)(p² + 9)
(p² + 3p - 3p - 9)(p² + 9)
(p(p) + p(3) - 3(p) - 3(3))(p² + 9)
(p(p + 3) - 3(p + 3))(p² + 9)
(p - 3)(p + 3)(p² + 9)

The answer is (3).
3 0
3 years ago
Read 2 more answers
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