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3 years ago

Help me and show your work.

Mathematics

1 answer:

astraxan [27]3 years ago

7 0

Answer:

x = 5/6

Step-by-step explanation:

From the question, we are told that the value of the perimeter equals the value of the area

mathematically, the area of a rectangle is the product of its side lengths

we have this as;

5 * 4x = 20x

The formula for the perimeter is;

P = 2(l + b)

P = 2(5 + 4x)

So we equate this to the area above

20x = 2(5 + 4x)

20x/2 = 5 + 4x

10x = 5 + 4x

10x - 4x = 5

6x = 5

x = 5/6

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(A) 2

Step-by-step explanation:

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Root 2: x = -3

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The Eagle Ridge Contractors Association claims the average price of a home in their subdivision is $125,150 with a standard devi

jonny [76]

Answer:

The test value is z = -1.31.

Step-by-step explanation:

The Eagle Ridge Contractors Association claims the average price of a home in their subdivision is $125,150.

This means that the null hypothesis is that the mean is this value, that is:

$H_0: \mu = 125150$

The Eagle Ridge Home Owners Association is interested in knowing if the costs of homes for sale in this subdivision are actually lower than claimed.

This means that at the alternate hypotehsis we test that the mean is lower than that value, that is:

$H_a: \mu < 125150$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

125150 is tested at the null hypothesis:

This means that $\mu = 125150$

Standard deviation of $7,350.

This means that $\sigma = 7350$

A sample of 36 homes for sale in this subdivision had an average selling price of $123,550.

This means that $n = 36, X = 123550$

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$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

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The test value is z = -1.31.

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3 years ago

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Nimfa-mama [501]

Answer:

C, D, E, F

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Remember y=mxb?

m is slope and b is y-intercept

so y=2/7x-9

Remember that slope is RISE/RUN so for every 2 squares that you go up, you go 7 squares to the right.

Also remember that since your graph is going thru your Cartiesian Plane in quadrent 4, your y value in your ordered pairs will most probably be a negative.

Please see the image to help you viualize this.

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