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kakasveta [241]
3 years ago
13

Am I on the right track for #16? If not plz explain. What are the next steps?

Mathematics
1 answer:
stellarik [79]3 years ago
7 0
It appears you are on the right track.
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Which polynomial identity will prove that 49-4=45
goldfiish [28.3K]
Consider the polynomial identity (difference of squares):
(x+y)(x-y) = x² - y²

Set x =7 and y = 2 to obtain
(7+2)*(7-2) = 7² - 2²
9*5 = 49 - 4
45 = 49 - 4
This is the result required, obtained by using difference of squares.

Answer: Difference of squares.
3 0
3 years ago
In variables estimation sampling, the sample standard deviation is used to calculate the?
Nikitich [7]

The sample standard deviation is used to calculate the determine the spread of estimates for a set of observations (i.e., a data set) from the mean (average or expected value).

<h3>What is sample standard deviation?</h3>

The spread of a data distribution is measured by standard deviation. The average distance between each data point and the mean is measured.

The sample standard deviation (s) is a measurement of the variation from the expected values and is equal to the sample variance's square root.

where

s = sample standard deviation

N = the number of observations

xi= the observed values of a sample item

\overline {x}= the mean value of the observations

Learn more about simple standard deviation, refer:

brainly.com/question/26941429

#SPJ4

3 0
2 years ago
In how many ways can 6 students be chosen from 9 students if the order in which the
harkovskaia [24]

Answer:

60480

Step-by-step explanation:

This question has to do with permutations. A permutation is used to find the number of possible outcomes, assuming order matters. In this case, n=9 and r=6. This is written as _{9}P_{6} which equals \frac{9!}{(9-6)!}. Then, plug this into a calculator to get 60480.

4 0
3 years ago
James is considering buying a home priced at $104,000. If the current market
KatRina [158]
$106,000

In a buyers market, people that are buying a house can get it for a good price.
In a sellers market the person selling their house can make more.
8 0
3 years ago
If four times a certain number, increased by 6 is equal to 49, what is the number
Studentka2010 [4]

Answer:

Step-by-step explanation:

6 0
4 years ago
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