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3 years ago

Solve the inequality. Select all of the solutions.

Mathematics

2 answers:

VARVARA [1.3K]3 years ago

4 0

Answer:

The answer is number 3.

Step-by-step explanation:

To get n by itslef, you have to divide -9 by both sides of the equation, however, since the -9 is in-between the two lines on the outside of it, it is therefore an absolute number. Usually when you divide both sides of an equation like this by a negative number, you would flip the less than symbol (>), but since the -9 is an absolute number, the negative does not count for anything. When you divide 63 by 9, you do not have to flip the less than symbol.

- Hope this helps.

zlopas [31]3 years ago

3 0

Answers 1. and 4.....

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3 years ago

A safety officer wants to prove that μ = the average speed of cars driven by a school is less than 25 mph. Suppose that a random

Akimi4 [234]

Answer:

$t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70$

The degrees of freedom are given by:

$df=n-1=14-1=13$

The p value for this case would be given by:

$p_v =P(t_{(13)}$

Step-by-step explanation:

Information given

$\bar X=24$ represent the mean height for the sample

$s=2.2$ represent the sample standard deviation

$n=14$ sample size

$\mu_o =25$ represent the value that we want to test

t would represent the statistic

$p_v$ represent the p value for the test

Hypothesis to verify

We want to cehck if the true mean is lees than 25 mph, the system of hypothesis would be:

Null hypothesis: $\mu \geq 25$

Alternative hypothesis: $\mu < 25$

The statistic would be given by:

$t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}$ (1)

Replacing the info given we got:

$t=\frac{24-25}{\frac{2.2}{\sqrt{14}}}=-1.70$

The degrees of freedom are given by:

$df=n-1=14-1=13$

The p value for this case would be given by:

$p_v =P(t_{(13)}$

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3 years ago

What is 144/36 simplified?

NARA [144]

144/36 in lowest terms is 4.

To show my work, here.

1. Find the GCF of 144 and 36 so now we divide (144/36 = 4 and 36/36 is 1)

2. Now we have 4/1 so we simplify again so divide 4/1 and its 4

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loris [4]

The answer would be C.

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3 years ago

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IgorLugansk [536]

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Step-by-step explanation:

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Therefore, 1 is 69, 2 is 69, and 3 is 111

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3 years ago