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lidiya [134]
3 years ago
11

Find the slope of the line that passes through the points (2, 1) and (-4, -5).

Mathematics
1 answer:
uysha [10]3 years ago
5 0

the slope of the  is m= 1

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According to the U.S. Bureau of the Census, the average age of brides marrying for the first time is 23.9 years with a populatio
JulsSmile [24]

Answer:

We conclude that young women are delaying marriage and marrying at a later age.

Step-by-step explanation:

We are given that the average age of brides marrying for the first time is 23.9 years with a population standard deviation of 4.2 years.

The sociologist randomly samples 100 marriage records and determines the average age of the first time brides is 24.9 years.

Let \mu = <u><em>average age of brides marrying for the first time.</em></u>

So, Null Hypothesis, H_0 : \mu = 23.9 years     {means that young women are not delaying marriage and marrying at a later age}

Alternate Hypothesis, H_A : \mu > 23.9 years     {means that young women are delaying marriage and marrying at a later age}

The test statistics that would be used here <u>One-sample z test statistics</u> as we know about the population standard deviation;

                         T.S. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample average age of the first time brides = 24.9 years

            \sigma = population standard deviation = 4.2 years

            n = sample of marriage records = 100

So, <u><em>the test statistics</em></u>  =  \frac{24.9-23.9}{\frac{4.2}{\sqrt{100} } }

                                     =  2.381

The value of z test statistics is 2.381.

<u>Now, at 1% significance level the z table gives critical value of and 2.326 for right-tailed test.</u>

Since our test statistic is more than the critical value of z as 2.381 > 2.326, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that young women are delaying marriage and marrying at a later age.

5 0
3 years ago
Please help (get brainliest)
skelet666 [1.2K]

Answer:

I belive its B.

Step-by-step explanation:

8 0
3 years ago
Jessie loves to go hiking on rustic trails through trees and along rivers.One day in 20 minutes of hiking, she hiked 1 mile. If
valentinak56 [21]

Answer:

Jessie hiked at a constant rate of 3 miles/hour

Step-by-step explanation:

Constant rate can also be called speed

The formula for constant rate /Speed = Distance (miles)/ time in hours

Distance = 1 mile

Time = 20 minutes

Converting to hours

60 minutes = 1 hour

20 minutes =

20/60

= 0.3333333333hour

Constant rate = 1mile/0.3333333333 hour

= 3.0000000003

= 3 miles/hour

8 0
3 years ago
Solve by factorising x² + 11x + 30 = 0<br> dont get think one could someone explain this please.
nalin [4]

Answer:

x={-5,-6}

Step-by-step explanation:

x²+11x+30=0

x²+5x+6x+30=0 (as 5*6=30 and 5+6=11)

x(x+5)+6(x+5)=0

(x+5)(x+6)=0

so

x+5=0

x+6=0

therefore

x=-5

x=-6

4 0
3 years ago
Read 2 more answers
2.<br> M<br> 28°<br> mZM =<br> N<br> L<br> mZNE
vovangra [49]

Answer:

28°

Step-by-step explanation:

..... ....... ..... ...

6 0
3 years ago
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