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raketka [301]
3 years ago
10

Bro i need this (x − 5)^2 = x^2 − 25

Mathematics
2 answers:
forsale [732]3 years ago
7 0

Answer:

x=5

Step-by-step explanation:

x^2+25-10x = x^2-25

-x^2               -x^2

25-10x = -25

-25        -25

-10x = -50

x=5

lets check

(5-5)^2 = 5^2-25

0^2 = 25-25

0 = 0

Greeley [361]3 years ago
7 0

Answer:

x = 5

Step-by-step explanation:

(x - 5)^2 = (x - 5) (x - 5) =

x^2 -10x + 25 = x^2 - 25

x^2 - x^2 - 10x + 25 = - 25 (x^2 - x^2 = 0)

- 10x + 25 = - 25

- 10x = - 25 - 25

x = - 50/- 10

x = 5

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A bag has 10 red marbles and 10 yellow marbles. Half of they yellow marbles are made of plastic. A marble is selected at random.
harina [27]
5:20 because there are 10 red marbles and 10 yellow marbles which equals 20 marbles all together and half of the 10 yellow marbles are plastic so 10 divided by 2 = 5
(1:4 if you need it simplified)
3 0
4 years ago
The city of Raleigh has 11700 registered voters. There are two candidates for city council in an upcoming election: Brown and Fe
Vesnalui [34]

Answer:

The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

The expected numbers of voters who would vote for Brown is 3604.

Step-by-step explanation:

The sample statistic is a numerical quantity used to represent a characteristic of a sample. For example, sample mean is a sample statistic representing the average of the sample. Or, sample proportion is a sample statistic representing the proportion of a particular variable in the sample. Or sample variance is a sample statistic representing the variance of the sample.

The sample statistic can be used to estimate the population parameter.

They are known as the point estimate of the parameter.

The sample proportion of a variable <em>X</em> is given by:

\hat p=\frac{X}{n}

It is provided that of the <em>n</em> = 250 registered voters selected, the number of voters who said they would vote for Brown is <em>X </em>= 77.

Compute the sample statistic for the proportion of voters surveyed who said they'd vote for Brown as follows:

\hat p=\frac{X}{n}

  =\frac{77}{250}\\

  =0.308

Thus, the sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.308.

Compute the expected number of people of the 11700 registered voters who would vote for Brown as follows:

E(X)=N\times \hat p

         =11700\times 0.308\\=3603.6\\\approx 3604

Thus, the expected numbers of voters who would vote for Brown is 3604.

6 0
3 years ago
Please help!!! I'll give brainliest, if you help U_U<br> Tysm for the help xD
Valentin [98]

Answer:

x is 122

Step-by-step explanation:

7 0
3 years ago
SHOW YOUR WORK and ill give brainlest :)
vodka [1.7K]

Answer:$259

Step-by-step explanation:

since we need to increase $250 by 6%, it is useful to find one percent because 1% is easy to find

to find one percent of 250, we move the decimal point(we cant see it right now) from after the number to after 2 giving us 2.50. we need to do this to find one percent because 1% is the same as one HUNDREDth, and since 100 has two zeros, we move the decimal place two spaces.now that we know that 1% is $2.50 ( which is the same as $2.5) we can times that by six which gives us 6%(because one times 6 is 6) to multiply 2.5 by 6, we first multiply 6 by 2 which will give us 12 and then multiply it by 0.5 (because 2 + 0.5 =2.5) 0.5 multiplied by 6 is equal to 3 and 3 + 6 = 9. we know know that 6% of $250 is $9. we now just add 9 to 250 leaving us with $259

6 0
3 years ago
Classify the type of polynomial <br><br> -15x^3
Hunter-Best [27]

Answer:

Cubic polynomial.

Step-by-step explanation:

Polynomials with their highest degree 3, are called cubic polynomials.

4 0
3 years ago
Read 2 more answers
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