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2 years ago

1. 5(x−7)5(x−7) 2. −9(p−3)−9(p−3) 3. 3(4x+3y)3(4x+3y) 4. −10(5p+7)−10(5p+7)

Mathematics

1 answer:

inn [45]2 years ago

4 0

Answer:

Step-by-step explanation:

because it is right unlike the other ones

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The U.S. Census Bureau announced that the median sales price in 2014 for new homes was $282,800 and the mean sales price was $34

victus00 [196]

Answer:

a) 0.9964

b) 0.3040

Step-by-step explanation:

Given data:

standard deviation = $90,000

Mean sales price =$345,800

sample mean = $370,000

Total number of sample = 100

calculate z score for [/tex](\bar x = 370000)[/tex]

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

$z = \frac{370000 - 345800}{\frac{90000}{\sqrt{100}}}$

z = 2.689

P(x<370000) = P(Z<2.689)

FROM STANDARD NORMAL DISTRIBUTION TABLE FOR Z P(Z<2.689) = 0.9964

calculate z score for (\bar x = 350000)

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

$z = \frac{350000 - 345800}{\frac{90000}{\sqrt{100}}}$

z = 2.133

$P(350000 \leq \bar x \leq 365000) = P(0.467 \leq Z\leq 2.133) = P(Z\leq 2.133) - P(Z\leq 0.467)$

FROM NORMAL DISTRIBUTION TABLE Z VALUE FOR

$P(Z\leq 2.133) = 0.9836$

$P(Z\leq 0.467) = 0.6796$

SO, = 0.9836 - 0.6796 = 0.3040

4 0

3 years ago

You think that the distance between your house in a friends house is 5.5 miles the actual distance is 4.75 miles what is the per

fredd [130]

Its about 13.64% multiply 4.75 by 100 then divide by 5.5 then subtract that number from 100

3 0

3 years ago

Need help pleaseee i have a test on friday

larisa [96]

Answer:

x = 8

Step-by-step explanation:

Using the sine or cosine ratio in the right triangle and the exact value

sin30° = $\frac{1}{2}$ , then

sin30° = $\frac{opposite}{hypotenuse}$ = $\frac{4}{x}$ = $\frac{1}{2}$ ( cross- multiply )

x = 8

5 0

3 years ago

Which inequality represents all the solutions of 10(3x + 2) > 7(2x − 4)?

Mrrafil [7]

Answer:

x>-3

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Brandon has a jar of quarters and dimes with a total value of $7.05. The number of quarters is 3 less than twice the number of d

miv72 [106K]

Answer:

quarters: 23
dimes: 13

Step-by-step explanation:

Let d represent the number of dimes. Then the number of quarters is 2d-3 and the total value of the coins is ...

0.10d + 0.25(2d-3) = 7.05

0.60d -0.75 = 7.05 . . . . . . . simplify

d = (7.05 +0.75)/0.60 = 13 . . . . add 0.75, divide by 0.60

2d-3 = 2·13 -3 = 23

Brandon has 23 quarters and 13 dimes.

4 0

3 years ago