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3 years ago

10

Helllllllpppppppppp!!!!!!!!

1 answer:

Ronch [10]3 years ago

6 0

Answer:

i dont know

Step-by-step explanation:

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PH is the midsegment of Triangle KLM. Find the value of x.

Gnoma [55]

Answer:

x = 26

Step-by-step explanation:

The midsegment is parallel to the side KM and half its length, thus

KM = x = 2 × 13 = 26

7 0

3 years ago

Estimate the products of 79 × 37 and 62 × 49 . Which choice shows the sum of the estimates?

klio [65]

Answer:

Sue of estimates = 6200

Step-by-step explanation:

$79\times37$ can be estimated as $80\times 40$ which is $=3200$

Similarly $62\times49$ can be estimated as $60\times 50$ which is $=3000$

∴ Sum of estimates = $3200+3000=6200$

4 0

3 years ago

3x+4/7-5x-4/7=3/7<br> A- (2)<br> B (-2)<br> C (4/3)<br> D (-4/7)

oksano4ka [1.4K]

That one is realy hard

5 0

4 years ago

A police officer would like to estimate the proportion of petty theft cases that have gone unsolved in a large city. He takes a

nata0808 [166]

Answer:

$0.625 \pm 1.645*0.0571$

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

$\pi$ is the estimate

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ , also called the critical value.

The standard error is:

$s = \sqrt{\frac{\pi(1-\pi)}{n}}$

90% confidence level critical value

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.955$ , so $z = 1.645$ .

Estimate:

72 petty theft cases and finds 45 of these have gone unsolved.

So $\pi = \frac{45}{72} = 0.625$

Standard error:

$s = \sqrt{\frac{\pi(1-\pi)}{n}} = \sqrt{\frac{0.625*0.375}{72}} = 0.0571$

Answer:

$0.625 \pm 1.645*0.0571$

7 0

3 years ago

Hatshy [7]

Answer:

Step-by-step explanation:

6 0

3 years ago