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3 years ago

Help please hllooooo

Mathematics

1 answer:

siniylev [52]3 years ago

8 0

9514 1404 393

Answer:

$81

Step-by-step explanation:

The garden is 4 yards = 12 feet by 3 yards = 9 feet. The area of it is the product of these dimensions, ...

(12 ft)(9 ft) = 108 ft²

The cost of fertilizer for that area will be ...

($0.75/ft²)(108 ft²) = $81.00

They will spend $81.00 to fertilize the garden.

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Solve the system of equations.<br> -10x+3y=5 <br> x=y-4

blsea [12.9K]

Answer:

x=y-4 -10x+3y=5

y=x+4 y=10/3x+5/3

x+4 =10/3x+5/3

x=1

y=1+4 y=10/3(1)+5/3

y=5 y=5

x=1

y=5

(1,5)

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3 years ago

Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random

Katen [24]

Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

$x_2 = 54$ --- City K

Required

Determine the 90% confidence interval

This is calculated using:

$CI = \bar x \± z\frac{\sigma}{\sqrt n}$

Calculating $\bar x$

$\bar x = \bar x_1 - \bar x_2$

$\bar x = \frac{x_1}{n} - \frac{x_2}{n}$

$\bar x = \frac{34}{200} - \frac{54}{200}$

$\bar x = 0.17 - 0.27$

For a 90% confidence level, the z-score is 1.65. So:

$z = 1.65$

Calculating the standard deviation $\sigma$

$\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }$

So:

$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

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Answer:

Step-by-step explanation:

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victus00 [196]

Gauge 4 I am pretty sure

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Ugo [173]

Answer:

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Step-by-step explanation:

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