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USPshnik [31]
3 years ago
7

To select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles th

e papers in a hat and randomly picks five names. What kind of sampling is being used?
Mathematics
1 answer:
Ainat [17]3 years ago
7 0

Answer:

We conclude that  a researcher  used simple random sample.

Step-by-step explanation:

We know that select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles the papers in a hat and randomly picks five names.  

We conclude that  a researcher  used simple random sample.

Because every children  has an equal chance of being included in the sample.

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Maslowich

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Step-by-step explanation:

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8 0
3 years ago
(4x-3)÷(2x+3) + (3+2x)÷(3x^2) =2<br> so what can x not be
Rudik [331]
Remember that if an x=value makes a denominator 0, the entire equation is undefined.

\frac{4x-3}{2x+3}+\frac{3+2x}{3x^{2}}=2\\\\2x+3=0\\\\2x=-3\\\\x=\frac{-3}{2}\\\\\\3x^{2}=0\\\\x^{2}=0\\\\x=0

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3 0
3 years ago
If (x - 3) represents the side of a cube, what is the<br>polynomial that represents its volume?​
hichkok12 [17]

Answer:

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Step-by-step explanation:

The volume (V) of a cube is calculated as

V = s³ ( s is the measure of the side ) , thus

V = (x - 3)³

   = (x - 3)(x - 3)(x - 3) ← expand the second/ third factors using FOIL

   = (x - 3)(x² - 6x + 9) ← distribute

   = x³ - 6x² + 9x - 3x² + 18x - 27 ← collect like terms

   = x³ - 9x² + 27x - 27

3 0
3 years ago
Find the area of the Compound shape<br><br> The answer is 89 m^2<br><br> I just need the steps....
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Answer:

Step-by-step explanation:

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7 0
3 years ago
A balloon has a circumference of 23 cm. Use the circumference to approximate the surface area of the balloon to the nearest squa
AveGali [126]
To get the surface area of a sphere, we need to have the radius. We are given the circumference. The circumference formula is C=2πr.  We need to solve for r. 
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The calculation for surface area is <span>A = 4πr^2. 
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Solve for A.

A= 168 cm^2.</span>
5 0
3 years ago
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