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kozerog [31]
4 years ago
10

In a study, the sample is chosen by writing everyones name on a playing card, shuffling the deck, then choosing the top 20 cards

what is the sampling method
Mathematics
1 answer:
storchak [24]4 years ago
4 0
Random sampling because everyone has an equal chance 
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3 years ago
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I believe you need to solve this using the quadratic formula!
To begin, this is what it is:
x= -b ± <span>√ b^2 - 4ac / 2a
Just plug in what you have in your problem...
2 being a, 13 being b, and -24 being c.
So we get:
x= -13 </span>± <span>√13^2 - 4(2)(-24) / 2(2)
x= -13 </span><span>± √169 - 8 (-24) / 4</span>
<span>x= -13 <span>± √169 + 192 / 4</span>
x= -13 </span>± √<span>361 / 4
The square root of 361 is 19.
So you have: -13 </span><span>± 19 / 4.
Here's where you take the equation </span>-13 <span>± 19 and put the addition and subtraction sign to use.
-13 - 19 = -32
and
-13 + 19 = 6
Now all is left to do is divide the two numbers by 4.
-32/4 = -8
and
6/4 = 3/2

x = -8, 3/2</span>
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4 years ago
You will get a loan from a bank for $5000. The interest rate will be 8% and the loan will be for 3 years. You will need to calcu
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Step-by-step explanation:

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