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3 years ago

I need help please get on z o o m

Mathematics

1 answer:

sergiy2304 [10]3 years ago

5 0

Answer:

Step-by-step explanation:

Send me link I will help u

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From Monday through Friday, a newspaper carrier delivered 121 papers each day. On Saturday and Sunday the carrier delivered 135

Dafna11 [192]

Answer:

The average is 125

Step-by-step explanation:

On Monday through Friday they carried 121 papers

5*121 = 605 papers

Saturday and Sunday they had 135

2*135 = 270

The total papers carried during the week was

605+270 = 875

there are 7 days in a week. To find the average, take the papers carried and divide by the number of days

875/7 = 125

8 0

3 years ago

Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2. Use the given sample sizes and numb

dezoksy [38]

Answer:

The calculated value Z = 3.775 > 1.96 at 0.05 level of significance

Null hypothesis is rejected

The Two Population proportion are not equal

Step-by-step explanation:

Given first sample size n₁ = 677

First sample proportion

$p^{-} _{1} = \frac{x_{1} }{n_{1} } = \frac{172}{677} = 0.254$

Given second sample size n₂ = 3377

second sample proportion

$p^{-} _{2} = \frac{x_{2} }{n_{2} } = \frac{654}{3377} = 0.1936$

Null Hypothesis : H₀ : p₁ = p₂.

Alternative Hypothesis : H₁ : p₁ ≠ p₂.

Test statistic

$Z = \frac{p_{1} ^{-}-p^{-} _{2} }{\sqrt{P Q(\frac{1}{n_{1} } +\frac{1}{n_{2} }) } }$

where

$P = \frac{n_{1} p_{1} + n_{2} p_{2} }{n_{1}+n_{2} } = \frac{677 X 0.254+3377 X 0.1936}{677+3377}$

P = 0.2036

Q = 1 - P = 1 - 0.2036 = 0.7964

$Z = \frac{0.254- 0.1936 }{\sqrt{0.2036 X 0.7964(\frac{1}{677 } +\frac{1}{3377 }) } }$

Z = 3.775

Critical value ∝=0.05

Z- value = 1.96

The calculated value Z = 3.775 > 1.96 at 0.05 level of significance

Null hypothesis is rejected

The Two Population proportion are not equal

3 0

3 years ago

4x-3y=1 5x+4y=9 What are the resulting equations?

Alex

Answer:

x = 1; y = 1

Step-by-step explanation:

First thing we will do is work with the first equation:

$4x - 3y = 1$

$4x = 1+3y$

$x = \frac{3}{4} y~+~\frac{1}{4}$

Now that we have a value for x, we insert that into the second equation, like so:

$5(\frac{3}{4}y~+~\frac{1}{4}) + 4y = 9$

$\frac{15}{4}y~+~\frac{5}{4} + 4y = 9$

$\frac{15}{4}y~+~4y~+~\frac{5}{4} = 9$

$\frac{15}{4}y~+~\frac{16}{4} y~+~\frac{5}{4}$

$\frac{31}{4}y~+~\frac{5}{4} =9$

$31y + 5 = 9 * 4$

$31y + 5 = 36$

$31y = 36-5$

$31y = 31$

$y = \frac{31}{31}$

$y = 1$

Now, we solve for x:

$4x - 3(1) = 1$

$4x - 3 = 1$

$4x = 1 + 3$

$4x = 4$

$x = \frac{4}{4}$

$x=1$

Hope it helped,

BiologiaMagister

8 0

3 years ago

AB Round your answer to the nearest hundredth. B 5 ? 40°

musickatia [10]

Answer:

Step-by-step explanation:

5 0

3 years ago

I need help finding the shaded region

soldi70 [24.7K]

First you would find the area of the rectangle; 34 • 14 = 476. Then you find the area of the semicircles. To make things easier you can put them together to make a circle and use the formula pi • r^2. So the equation would be set up as 3.14 • 7^2. I used 7 because the diameter is 14 and the radius is half of that. So the answer to that is 153.86. I’m not sure if you can round but in this case I won’t. So you would then subtract; 476 - 153.86 making the answer 322.14 units^2

3 0

3 years ago

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