Help!!!!!! Math problem

Mathematics

1 answer:

NikAS [45]3 years ago

4 0

Answer:

x=5

Step-by-step explanation:

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It want want toooo knowwww what is wasf What is 5 1/2+2 1/7

svp [43]

Exact form: 107/14

mixed number form: 7 9/14

8 0

3 years ago

Read 2 more answers

A real estate agent has surveyed houses in twenty nearby zip codes in an attempt to put together a comparison for a new property

gladu [14]

Answer:

A a house in that market that sells for $300,000 is unusual.

Step-by-step explanation:

Let the random variable X denote the price of a house and the random variable Y denote the living area of a house.

The number of houses surveyed by the real estate agent is, n = 1057.

Assume that both the random variables, X and Y are approximately normally distributed.

That is,

$X\sim N(\$169400,\ \$68438)\\\\Y\sim N(2058\ \text{sq. ft.},\ 790\ \text{sq. ft.})$

To compute the probability of a Normal distribution we first need to convert the raw scores to z-scores.

$z=\frac{\text{Raw score}-\mu}{\sigma}$

A z-score higher than 1.96 and lower than -1.96 are considered unusual. The values having these z-scores are considered as outliers.

(1)

Compute the z-score for X = 300000 as follows:

$z=\frac{X-\mu}{\sigma}\\\\=\frac{300000-169400}{68438}\\\\=2.70$

(2)

Compute the z-score for Y = 3000 as follows:

$z=\frac{Y-\mu}{\sigma}\\\\=\frac{3000-2058}{790}\\\\=1.19$

The z-score for a house in that market that sells for $300,000 is more than 1.96.

This implies, that the price $300,000 is unusually high.

The complete statement is:

The house that sells for $300 comma 000 has a z-score of 2.70 and the house with 3000 sq ft has a z-score of 1.19.

5 0

3 years ago

Find the value of z. 2v~2 6v~2 3 2

Pie

Suppose the sides of the big triangle are called m, x and 12+4=16. We have that the big triangle and the small triangle to the right of the shape (sides x,y,12) are similar. We can take then the ratios of correponding sides and know that they will be equal. Thus, we have that 4/y=y/12. Hence, y*y=48. Thus y= $\sqrt{48} = 4 \sqrt{3}$ .