NEED HELP PLZ ASAP WHAT IS X -6(-14+3x)-2x=144
2 answers:
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Answer:
Let d1 be the diameter of the moon and d2 and be the diameter of the earth.Let r1 be the radius of the moon and r2 be the radius of the earth.
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><u><em> = population proportion of drivers 16-24 years old who buckle up .</em></u>
<u><em /></u><u><em> = population proportion of drivers 25-69 years old who buckle up .</em></u>
So, Null Hypothesis, :
= 0 {means that there is no significant difference in seat belt use}
Alternate Hypothesis, :
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. = ~ N(0,1)
where, = sample proportion of drivers 16-24 years old who buckle up = 79%
= sample proportion of drivers 25-69 years old who buckle up =
= 84%
= sample of 16-24 years old drivers = 1000
= sample of 25-69 years old drivers = 1100
So, <u><em>test statistics</em></u> =
= -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.
Using a proportional relationship, we have that:
- a) The constant of proportionality is of 0.625, hence the equation is:
.
- b) The distance of two cities that are 5 miles apart is of 8 kilometers.
- c) When they are 200 kilometers apart, we have that the distance in miles is of
.
- A <em>proportional relationship</em> is a function in which the <u>output variable is given by the input variable multiplied by a constant of proportionality</u>, that is:.
- In which k is the constant of proportionality.
Item a:
From the graph, when x = 8, y = 5, hence:
The constant of proportionality is of 0.625, hence the equation is: .
Item b:
From the graph, when y = 5, x = 8, hence:
- The distance of two cities that are 5 miles apart is of 8 kilometers.
Item c:
When they are 200 kilometers apart, we have that the distance in miles is of .
You can learn more about proportional relationship at brainly.com/question/13550871