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3 years ago

Help me please because of the points

Mathematics

1 answer:

xxTIMURxx [149]3 years ago

8 0

Answer:

Step-by-step explanation:

Because the dolphin increases his elevation, the amount he increases is added to the original elevation to get the second elevation.

Therefore:

-16 3/4 + 5x = -5 1/4

This option is not in the options but if we rearrange the left side from

- 16 3/4 + 5x

to:

5x - 16 3/4

We get the last option C.

Hope this helped!

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Find the midpoint M of the line segment joining the points A= (-7, -6) and B= (1,8).

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Step-by-step explanation:

Use midpoint formula,

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(x,y)=(-3,1)

so , the coordinates of mid point of line segment is M (-3,1)

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2 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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2 years ago

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Answer:

x > -1

Step-by-step explanation:

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From the graph we can see that our x-values span from -1 to infinity. Since -1 is open dot, it is not included in the domain:

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3 years ago

Which line has a slope of 3 and a y-intercept of 4

Alex17521 [72]

Answer:

You didn't provide the lines but I graphed it for you so you can match it up

Step-by-step explanation:

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3 years ago

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