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sergejj [24]
3 years ago
11

plz solve, I will give brainliest, There are three consecutive integers. The sum of the first two is 51 more than the third. Fin

d the integers.
Mathematics
2 answers:
Lina20 [59]3 years ago
8 0
X+x+1=51+x+2
2x+1=x+53
x=52

integeers are 52. 53 and 54
Natasha2012 [34]3 years ago
8 0

The integers are \boxed{52}, \boxed{53} and \boxed{54}.

Further explanation:

Given:

The sum of the first two is 51 more than the third.

Explanation:

Consider the first integers as x.

So the second integers is x+1.

Therefore, the third integers is x+2.

Given that the sum of first two numbers is 51 more than the third.

\begin{aligned}\left( x \right) + \left( {x + 1} \right) &= 51 + \left( {x + 2} \right)\\x + x + 1 &= 51 + x + 2\\2x + 1 &= 53 + x\\2x - x &= 53 - 1 \\x&= 52\\\end{aligned}

The first integer is 52.

The second integer can be calculated as,

\begin{aligned}{\text{Second integer}} &= x + 1\\&= 52 + 1\\&= 53\\\end{aligned}

The second integer can be calculated as,

\begin{aligned}{\text{Third integer}}&= x + 2\\&= 52 + 2\\&= 54\\\end{aligned}

Hence, the integers are \boxed{52}, \boxed{53} and \boxed{54}.

Learn more:

  1. Learn more about inverse of the functionhttps://brainly.com/question/1632445.
  2. Learn more about equation of circle brainly.com/question/1506955.
  3. Learn more about range and domain of the function brainly.com/question/3412497

Answer details:

Grade: High school

Subject: Mathematics

Chapter: Linear equation

Keywords: Three consecutive, consecutive, sum, addition, integers, more, 51 more, consecutive integers, first two.

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Many elementary school students in a school district currently have ear infections. A random sample of children in two different
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Answer:

Step-by-step explanation:

The summary of the given data includes;

sample size for the first school n_1 = 42

sample size for the second school n_2  = 34

so 16 out of 42 i.e x_1 = 16 and 18 out of 34 i.e x_2 = 18 have ear infection.

the proportion of students with ear infection Is as follows:

\hat p_1 = \dfrac{16}{42} = 0.38095

\hat p_2 = \dfrac{18}{34}  =  0.5294

Since this is a two tailed test , the null and the alternative hypothesis can be computed as :

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Using the table of standard normal distribution, the value of z that corresponds to the two-tailed probability 0.05 is 1.96. Thus, we will reject the null hypothesis if the value of the test statistics is less than -1.96 or more than 1.96.

The test statistics for the difference in proportion can be achieved by using a pooled sample proportion.

\bar p = \dfrac{x_1 +x_2}{n_1 +n_2}

\bar p = \dfrac{16 +18}{42 +34}

\bar p = \dfrac{34}{76}

\bar p = 0.447368

\bar p + \bar  q = 1 \\ \\ \bar q = 1 -\bar  p \\  \\\bar q = 1 - 0.447368 \\ \\\bar q = 0.552632

The pooled standard error can be computed by using the formula:

S.E = \sqrt{ \dfrac{ \bar p \bar q}{ n_1} +  \dfrac{\bar p \bar p}{n_2} }

S.E = \sqrt{ \dfrac{  0.447368 *  0.552632}{ 42} +  \dfrac{ 0.447368 *  0.447368}{34} }

S.E = \sqrt{ \dfrac{  0.2472298726}{ 42} +  \dfrac{ 0.2001381274}{34} }

S.E = \sqrt{ 0.01177284105}

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The test statistics is ;

z = \dfrac{\hat p_1 - \hat p_2}{S.E}

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Decision Rule: Since the test statistics is greater than the rejection region - 1.96 , we fail to reject the null hypothesis.

Conclusion: There is insufficient evidence to support the claim that a difference exists between the proportions of students who have ear infections at the two schools

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