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Tamiku [17]
3 years ago
12

When conducting a survey, it is important to use a random sample:to get a significant result.to avoid bias and to get a represen

tative sample.so that we can make causal conclusions.to ensure truthful answers to the survey's questions.none of the above.
Mathematics
1 answer:
AleksAgata [21]3 years ago
8 0

Answer: to avoid bias and to get a representative sample

Step-by-step explanation:

A random sample is useful for:

Avoid bias: if you have a selected sample, all of the selected individuals may have some common factor (same age group, same salary rage, same political ideology) so the sample may be kinda biased, this is something that you may want to avoid.

All the other options can not be ensured by any method, you survey, even with a random sample, may have no significant result, and you can not ensure that the surveyed people will answer truthfully.

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A) A shopkeeper marked the price of an article a certain percent above the cost price and
Afina-wow [57]

Answer:

25%

Step-by-step explanation:

customer paid = 9492

less vat (13%) .net =8400

discount =16%==marked price = 8400X 100/84==10,000

profit on sale =5% .  cost :=8000

% on cost   (2000/ 8000) X100 =25%

3 0
3 years ago
What is the intermediate step in the form (x+a)^2=b(x+a)
Step2247 [10]

Answer:

The intermediate step are;

1) Separate the constants from the terms in x² and x

2) Divide the equation by the coefficient of x²

3) Add the constants that makes the expression in x² and x a perfect square and factorize the expression

Step-by-step explanation:

The function given in the question is 6·x² + 48·x + 207 = 15

The intermediate steps in the to express the given function in the form (x + a)² = b are found as follows;

6·x² + 48·x + 207 = 15

We get

1) Subtract 207 from both sides gives 6·x² + 48·x = 15 - 207 = -192

6·x² + 48·x = -192

2) Dividing by 6 x² + 8·x = -32

3) Add the constant that completes the square to both sides

x² + 8·x + 16 = -32 +16 = -16

x² + 8·x + 16 = -16

4) Factorize (x + 4)² = -16

5) Compare (x + 4)² = -16 which is in the form (x + a)² = b

7 0
3 years ago
I need help with 2 of these math question
fgiga [73]

Answer:

10

Step-by-step explanation:

20/2=10

10+10=20

17

5 0
2 years ago
Read 2 more answers
Andre withdrew spending money from his checking account that initially had $982. What was the amount of his withdrawal, w, if hi
Angelina_Jolie [31]

Answer:

$60.00

Step-by-step explanation:

you subtract the original number with the new number to see the difference.

3 0
3 years ago
21.60 divided by 1.35 is what?
klasskru [66]

Answer:

16

Step-by-step explanation:

21.60 divided by 1.35=16

8 0
2 years ago
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