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insens350 [35]
3 years ago
6

In a study, the sample is chosen by pulling 50 names from a hat What is the sampling method? Simple Random Stratified Convenienc

e None of these
Mathematics
1 answer:
spin [16.1K]3 years ago
7 0

Answer:  Simple Random

Step-by-step explanation:

  • A simple random sampling technique is a random sample technique in which a subset of the population is drawn by the researcher . They are chosen in such a way that all the individuals in the population has an equal chance to get chosen .

Given : In a study, the sample is chosen by pulling 50 names from a hat .

Here the probability of each name to get selected is equal.

Thus, this is a simple random sampling method.

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5% of what number is 85?
Semmy [17]
5% = 0.5

0.5n = 85

Divide by 0.5

0.5n = 85
/0.5      /0.5

n = 170.

The number is 170.
8 0
4 years ago
The volume of a rectangular prism is given by the expression 2x^4+2x^3-4x^2-4x. Write the volume as the product its dimensions.
telo118 [61]
<h3>Answer:  2x(x^2-2)(x+1)</h3>

=========================================================

Explanation:

First factor out the GCF 2x

2x^4+2x^3-4x^2-4x

2x*x^3+2x*x^2-2x*2x-2x*2

2x(x^3 + x^2 - 2x - 2)

Then let's factor the expression inside the parenthesis using the factor by grouping method

x^3 + x^2 - 2x - 2

(x^3 + x^2) + (- 2x - 2)

x^2(x + 1) - 2(x + 1)

(x^2 - 2)(x+1)

We see that x^3 + x^2 - 2x - 2 factors to (x^2-2)(x+1)

Overall, the original expression fully factors to 2x(x^2-2)(x+1)

length = 2x

width = x^2-2

height = x+1

The order of length, width, and height doesn't matter.

7 0
2 years ago
-5х + Зу = -8<br> 3х - 7y = -3<br> Ordered pair
tatiyna

Answer:

1. y= 2x-5        

2. y= x+3

3. y=2x+7

Step-by-step explanation:

6 0
3 years ago
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krok68 [10]
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3 years ago
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