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liubo4ka [24]
3 years ago
7

Which statement correctly compares the angles?

Mathematics
2 answers:
Valentin [98]3 years ago
3 0

Answer:

its B

Step-by-step explanation:

well...you can see it XD

Murljashka [212]3 years ago
3 0

Answer:

Yepp B is correct on Edge

Step-by-step explanation:

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Simone travels 90 miles at an average speed of 40 mph.
denis-greek [22]

Using the relation between velocity, distance and time, it is found that her average speed for the final 30 miles is of 55.56 mph.

<h3>What is the relation between velocity, distance and time?</h3>

Velocity is distance divided by time, that is:

v = \frac{d}{t}

Simone travels 90 miles at an average speed of 40 mph, hence the time is given by:

t_1 = \frac{90}{40} = 2.25

She then travels a further 30 miles, with an average speed for the journey of 43 mph. Hence, she traveled 90 + 30 = 120 miles, and the total time is given by:

t = \frac{120}{43} = 2.79

Hence, in the second part, she traveled 30 miles in 2.79 - 2.25 = 0.54 hours, so the velocity is given by:

v = \frac{d}{t} = \frac{30}{0.54} = 55.56

Her average speed for the final 30 miles is of 55.56 mph.

More can be learned about the relation between velocity, distance and time at brainly.com/question/24316569

#SPJ1

5 0
2 years ago
If f(x)=9x-8, which of the following is the inverse of f(x)?
USPshnik [31]
f(x)=9x-8\\&#10;y=9x-8\\&#10;9x=y+8\\&#10;x=\dfrac{1}{9}y+\dfrac{8}{9}\\&#10;f^{-1}(x)=\dfrac{1}{9}x+\dfrac{8}{9}
8 0
3 years ago
There are 6 red marbles, 8 blue marbles, and 11 green marbles in a bag. What is the probability that you will randomly draw eith
stiv31 [10]

Answer:

probably  32% or 24%

Step-by-step explanation:

well there is more green marbles then blue and red so if pulling a green that would maybe make it 56%

3 0
2 years ago
Read 2 more answers
A sociologist wishes to estimate the percentage of the United States population living in poverty. What size sample should be ob
andriy [413]

Answer:

a) We need a sample size of at least 705.

b) We need a sample size of at least 1692.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.95, so Z = 1.645.

a) If she uses 1999 estimate of 11.8% obtained from the Current Population Survey.

We need a sample of size at least n

n is found when M = 0.02, \pi = 0.118.

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.645\sqrt{\frac{0.118*0.882}{n}}

0.02\sqrt{n} = 1.645\sqrt{0.118*0.882}

\sqrt{n} = \frac{1.645\sqrt{0.118*0.882}}{0.02}

(\sqrt{n})^{2} = (\frac{1.645\sqrt{0.118*0.882}}{0.02})^{2}

n = 704.08

Rounding up

We need a sample size of at least 705.

b) She does not use any estimate.

Same thing as above, we just use \pi = 0.5 when do not use any estimate.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 1.645\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 1.645\sqrt{0.5*0.5}

\sqrt{n} = \frac{1.645\sqrt{0.5*0.5}}{0.02}

(\sqrt{n})^{2} = (\frac{1.645\sqrt{0.5*0.5}}{0.02})^{2}

n = 1691.2

Rounding up

We need a sample size of at least 1692.

4 0
3 years ago
What is the ratio of students who dance to the total number of students?<br>​
Citrus2011 [14]

Answer:

I'm sorry I don't know the ratio but the whole number of students is 164 and dance students is 43 i hope this helps if not im sorry i tried to help

Step-by-step explanation:

4 0
3 years ago
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