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11111nata11111 [884]
3 years ago
13

Which compound inequality can be used to solve the inequality. |3×+2| >7​

Mathematics
2 answers:
ddd [48]3 years ago
4 0

Answer:

Step-by-step explanation:

|3x+2|>7

3x+2<-7

and 3x+2>7

Nookie1986 [14]3 years ago
4 0

Answer:

D

Step-by-step explanation:

did the test on edg

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) The National Highway Traffic Safety Administration collects data on seat-belt use and publishes results in the document Occupa
asambeis [7]

Answer:

We conclude that there is a difference in seat belt use.

Step-by-step explanation:

We are given that of 1,000 drivers 16-24 years old, 79% said they buckle up, whereas 924 of 1,100 drivers 25-69 years old said they did.

<u><em>Let </em></u>p_1<u><em> = population proportion of drivers 16-24 years old who buckle up .</em></u>

<u><em /></u>p_2<u><em> = population proportion of drivers 25-69 years old who buckle up .</em></u>

So, Null Hypothesis, H_0 : p_1-p_2 = 0      {means that there is no significant difference in seat belt use}

Alternate Hypothesis, H_A : p_1-p_2\neq 0      {means that there is a difference in seat belt use}

The test statistics that would be used here <u>Two-sample z proportion statistics;</u>

                     T.S. =  \frac{(\hat p_1-\hat p_2)-(p_1-p_2)}{\sqrt{\frac{\hat p_1(1-\hat p_1)}{n_1}+\frac{\hat p_2(1-\hat p_2)}{n_2} } }  ~ N(0,1)

where, \hat p_1 = sample proportion of drivers 16-24 years old who buckle up = 79%

\hat p_2 = sample proportion of drivers 25-69 years old who buckle up = \frac{924}{1100} = 84%

n_1 = sample of 16-24 years old drivers = 1000

n_2 = sample of 25-69 years old drivers = 1100

So, <u><em>test statistics</em></u>  =  \frac{(0.79-0.84)-(0)}{\sqrt{\frac{0.79(1-0.79)}{1000}+\frac{0.84(1-0.84)}{1100} } }  

                              =  -2.946

The value of z test statistics is -2.946.

Since, in the question we are not given with the level of significance so we assume it to be 5%. <u><em>Now, at 0.05 significance level the z table gives critical values of -1.96 and 1.96 for two-tailed test.</em></u><em> </em>

<em>Since our test statistics doesn't lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which </em><em><u>we reject our null hypothesis</u></em><em>.</em>

Therefore, we conclude that there is a difference in seat belt use.

4 0
3 years ago
What is the equation of the line given the table
OLEGan [10]

Answer:

y=3x-1

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Given the system of equations presented here:
Nata [24]
2x + 4y = 14
4x + y = 20......multiply by -4
----------------
2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
---------------add
-14x = -66....as u can see, ur y's cancel out

so ur answer is : 1st answer choice <==

** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's
6 0
3 years ago
Eitan is on a train heading west into the city while Dmitri is on a train on the adjacent track heading east, away from the city
siniylev [52]
The time when the two trains reach each other is 1.25 hours
The trains are 68.75 away from the city when they reach each other.
6 0
3 years ago
Read 2 more answers
a hardware store has 568 nails in 8 bins. each bin has the same number of nails. how many nails are in each bin? Luke solve this
stiks02 [169]

Answer:

No

Step-by-step explanation:

Because you have to multiply 568 x 8 to get 4084 but when u multiply it u get 2272

8 0
3 years ago
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