a train travels 18 km in 30 minutes.Find the speed of the train in km/h

Answers

Answer 1

Step-by-step explanation:

s=d/t

s=18/30

s=3/5km/h


Related Questions

Find the median of the data set. 1470, 1590, 1420, 1215, 1405, 1370, 1465, 1460, 1230

Answers

Answer:

the median is the middle number find the middle number of these and there's your answer

Answer:

1420 is the Median

Step-by-step explanation:

What is the most likely meaning of the word endangered?

influenced

exposed

assisted

threatened

Answers

Answer:

exposed is another word for endangered

Exposed is another word for endangered

The answer I don’t know math and at this point I’m gonna fail 8th grade this is my last resort pls

Answers

Answer:

1: 107°

2: 73°

Line b and a is same. So, straight line is 180°. hence, 180-107=73

Find two ratios equivalent to each ratio 3:11

Answers

Answer:

Multiplying each side by 5⇒ 15: 55

Multiplying each side by 10⇒30:110

Step-by-step explanation:

Answer:  3:11= 30:110 and 6:22

Step-by-step explanation:

30:110 is multipled by 10 and 6:22 is multiplied by 2!

It can be divided or multiplied by whatever number you want! If you want to divide it by one number, make sure that it will be without the remainder because it’s equivalent! I hope I helped you!

Can a right triangle be made from given side lengths 4 in,6 in, 8in

Answers

Answer:

no

Step-by-step explanation:

I dont know how to explain but I did the work and it was clearly not a right angle


please help answer

Answers

After all that typing in the comments, LOL. The hardest part was figuring out the area of the stripes. I put those calculations off to the right. Please let me know if you can’t read my writing.

A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 150 students who averaged 42 minutes concentrating on their professor during the hour lecture. The standard deviation was 12 minutes.
Round your answers to two decimal places.
A. The sampling distribution follows a ____ distribution.
B. With 95% confidence the population mean minutes of concentration is between_____ and_____ minutes.
C. If many groups of 150 randomly selected students are studied, then a different confidence interval would be produced from each group. About ______ percent of these confidence intervals will contain the true population mean number of minutes of concentration and about ______ percent will not contain the true population mean number of minutes of concentration.

Answers

Answer:

A. Normal

B. Between 40.08 minutes and 43.92 minutes.

C. About 95 percent of these confidence intervals will contain the true population mean number of minutes of concentration and about 5 percent will not contain the true population mean number of minutes of concentration.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean [tex]\mu = p[/tex] and standard deviation [tex]s = \sqrt{\frac{p(1-p)}{n}}[/tex]

x% confidence interval:

A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.

Question A:

By the Central Limit Theorem, a normal distribution.

Question B:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

[tex]M = 1.96\frac{12}{\sqrt{150}} = 1.92[/tex]

The lower end of the interval is the sample mean subtracted by M. So it is 42 - 1.92 = 40.08 minutes

The upper end of the interval is the sample mean added to M. So it is 42 + 1.92 = 43.92 minutes

Between 40.08 minutes and 43.92 minutes.

Question C:

x% confidence interval -> x% will contain the true population mean, (100-x)% wont.

So, 95% confidence interval:

About 95 percent of these confidence intervals will contain the true population mean number of minutes of concentration and about 5 percent will not contain the true population mean number of minutes of concentration.

A small hair salon in Denver, Colorado, averages about 30 customers on weekdays with a standard deviation of 6. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $2 discount on 5 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 5 weekday period jumps to 35.

Required:
What is the probability to get a sample average of 35 or more customers if the manager had not offered the discount?

Answers

Answer:

0.0314 = 3.14% probability to get a sample average of 35 or more customers if the manager had not offered the discount

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

A small hair salon in Denver, Colorado, averages about 30 customers on weekdays with a standard deviation of 6.

This means that [tex]\mu = 30, \sigma = 6[/tex]

5 consecutive weekdays.

This means that [tex]n = 5, s = \frac{6}{\sqrt{5}} = 2.6832[/tex]

What is the probability to get a sample average of 35 or more customers if the manager had not offered the discount?

This is 1 subtracted by the pvalue of Z when X = 35.

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

By the Central Limit Theorem

[tex]Z = \frac{X - \mu}{s}[/tex]

[tex]Z = \frac{35 - 30}{2.6832}[/tex]

[tex]Z = 1.86[/tex]

[tex]Z = 1.86[/tex] has a pvalue of 0.9686

1 - 0.9686 = 0.0314

0.0314 = 3.14% probability to get a sample average of 35 or more customers if the manager had not offered the discount

For every 2 hours, approximately $1,302 worth of product is sold to consumers. How much money will the company make from selling this product for an entire month (30 days)? what's the answer

Answers

Answer:

391,248 dollars

Step-by-step explanation:

Which is the correct answer?

Answers

C because I said
So
Lol
Ahahha
Goggle

someone help me answer this!!

Answers

Answer:

27

Step-by-step explanation:

45 x 45 - 36 x 36 = 729   the square root of 729 is 27

Answer:

a = 27 m is the answer.

Step-by-step explanation:

a = ?

b = 36 m

c = 45 m

According to the Pythagoras theorem,

a² + b² = c²

a² + 36² = 45²

a² + 1296 = 2025

a² = 2025 - 1296

a² = 729

a = 27 m

∴ a = 27 m is the length of the missing leg.

5m²+15m=0

t²-5t+6=0

5p²+12p+4=0

2a²+10a-48=0

x(2x+5)=0

Answers

Answer:

m=1, m= -3

t=3, t=2

p= -0.4, p= -2

a= 3, a= -8

x=0, x= -2.5

Answer:

I hope this helps a little bit.

It Is Not Fake

It Got Answers Promise

A shirt is on sale for 35% off the original price. If the original price is $39.00 what is the sale price?

Answers

Answer:

$25.35

Step-by-step explanation:

You just take off the percentage from the original price to get your final answer.

Hope this helps c:

determine length of RT

Answers

Answer:

20

Step-by-step explanation:

Alicia, Jamar, and Tia collect dimes for charity. Alicia collects (3k+4) dimes. Jamar collects twice as many dimes as Alicia. Tia collects 4(5+6k) dimes. How many dimes do they collect altogether in terms of k?

Answers

Answer:

33k+32

Step-by-step explanation:

Assign Variables :

Alicia- A

Jamar- J

Tia- T

Write equations :

A = (3k+4)

J= 2(3k+4)

T=4(5+6k)

Simplify equations:

A= 3k+4

J= 6k+8

T= 20+24k

Add:

(3k+4)+(6k+8)+(20+24k)

3k+6k+24k+8+20+4

33k+32

I hope this helps :)

Which is a coefficient matrix for the system of linear equations?

Answers

Answer:

D. 1

Step-by-step explanation:

[tex]-2\left[\begin{array}{cc}x&-1\\3&5\end{array}\right]+\left[\begin{array}{cc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right][/tex] ⇒[tex]\left[\begin{array}{cc}-2x&2\\-6&-10\end{array}\right]+\left[\begin{array}{cc}3&8\\-1&6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right][/tex] ⇒ [tex]\left[\begin{array}{cc}-2x+3&2+8\\-6-1&-10+6\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right][/tex] ⇒[tex]\left[\begin{array}{cc}-2x+3&10\\-7&-4\end{array}\right] = \left[\begin{array}{cc}x&10\\-7&-4\end{array}\right][/tex] ⇒-2x + 3 = x3x = 3x = 1

Correct choice is D

Answer:

d

Step-by-step explanation:

PLEASE HELP !! ILL GIVE BRAINLIEST !!

Answers

Answer:

angle klj and angle poq :)

Step-by-step explanation:

PQRS is a quadrilateral.
PST is a straight line.

Find the value of y

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Since pqrs is a quadrilateral

Total interior angle = 360 (keep in mind)

>PSR = 360-(65+130+95)

>PSR= 360-290=  70

* PST is a straight line :- >PSR + Y = 180 (sum of angle on a straight line)

:. Y= 180-70= 110.

Consider the function f(x) = 2 + 2x - 15. What are the x-intercepts of the function?

Answers

Answer:

x=6.5

Step-by-step explanation:

I got the x- intercept as 6.5 because I found the x value when y equals 0.

0=2+2x-15

Next, I added 2+-15 and got -13.

0=2x-13

Then, I added 13 to both sides so that I could have x by itself.

13=2x

Next, I divided 2 on both sides so I could find the value of x.

6.5= x

In conclusion, the x- intercept of f(x)=2+2x-15 is 6.5.  

a bag contains 6 red marbles 2 blue marbles and 1 green marble. find p(not blue)

Answers

Answer:

9?

Step-by-step explanation:

Sorry I don't know I think its 9 though

Which of the pairs (2, 3), (1, 2.5), (6, 1), or (−2, 2) is the solution to the equation 4y−x= 10?

Answers

Answer:

(2,3)

Step-by-step explanation:

4(3)-(2)=10

12-2=10

The answer is (2,3)

Draw a line tangent to the circle at the point (0, 4). Write an equation for this tangent line. Explain your work.PLEASE HELP

Answers

Answer:

y = 1/4x + 4

Step-by-step explanation:

...
6
2.
Find the value of x in the parallelogram below.
33
16

Answers

Answer:

sorry where is the parallelogram

Answer:

your question is imcomplete

Step-by-step explanation:

If f(x)=(x-3)^2+1 what is f(6)

Pls help

Answers

Answer:

I love algebra anyways  

the ans is in the picture with the steps  

(hope it helps can i plz have brainlist :D hehe)

Step-by-step explanation:

please someone help me with this ASAP especially with the workout!!

Answers

Answer is 42 degrees! Half of a circle is 180 degrees, so 180+138 is 318. Now, we wanna find that smaller part of the circle. So, 360-318 gives the left over which is 42 degrees. Hope this helped! Brainliest is appreciated :DDD

At a football game, a vender sold a combined total of 108 sodas hot dogs. The number of hot dogs sold was 52 less than the number of sodas sold Find the number of sodas sold and the number of hot dogs sold.

Answers

Answer:

28 hotdogs were sold and 80 sodas were sold.

'-''-'--'-'-'--''--'-'--'

A dragonfly can travel 72 miles in 2 hours at a constant rate. How fast can it fly?
A. 18 mph
B. 36 mph
C. 48 mph
D. 73 mph

Answers

the answer is B because you divid 72 by 2

What is the missing number?

Answers

Answer:

y = 2^{x}

Step-by-step explanation:

Given the above data for x and y.

From the algebraic expression;

y = 2^{x}

We can deduce that the value of y is equal to two (2) raise to the power of x.

When x = 1, y = 2

y = 2^{x}

y = 2^{1}

y = 2

When x = 2, y = 4

y = 2^{x}

y = 2^{2}

y = 4

When x = 3, y = 8

y = 2^{x}

y = 2^{3}

y = 8

The above calculations can be used to determine the other values of y with respect to x.

Which of the following best describes the graph of the logarithmic function
given below?

Answers

Answer:

A) Decreasing

Step-by-step explanation:

By graphing the logarithmic equation, we can see that as the x value increases, the y value decreases. Therefore, we say that the graph is decreasing.

Answer:

decreasing

Step-by-step explanation:

Find the measure of the line segment indicated, assume that lines which appear tangent are tangent. (2 questions) PLS help with these problems ! Pls don't just do it for points

Answers

Answer:

1

Step-by-step explanation:

Other Questions
Drag each description to the correct location on the table. Match each description to the correct type of poetry. expresses personal thoughts and emotions contains plot elements such as conflict, climax, and resolution presents multiple characters uses a single speaker narrative lyric A mirror has a parabolic surface defined by the equation y =StartFraction 1 Over 24 EndFraction x2 with the vertex (0, 0) at the center of the mirror. When the width of the mirror is 8 inches, what is the depth, y, of the mirror?1/36 in.1/6 in.2/3 in.2 2/3 in.ITS C: 2/3 in. You hold an object up with a spring scale and it reads 5N.What is the mass of the object? Average speed is the rate at which an object is moving at a given instant. True or False. What happens to the conductivity of water when a base is dissolved in it. For the following reactions, predict the products, phases, and balance the chemical reactions,6)NaBr (aq) +H3PO4 (aq) Convert the following angle from degrees to radians. Express your answer in simplestform.375 Shigenobus point of view regarding Western attitudes toward Japan as expressed in the passage is significant in that similar ideas were used by members of the Japanese government during the period between the First and the Second World Wars to justify Two neutral objects - object A and object B - are rubbed together. During the process,electrons are transferred from object A to object B. This would cause object A to acquirea charge and object B to acquire a charge. what is the cost driver for rent expense? Which is the best example of an explicit statement from Thoughts and Sentiments that shows Cugoano's beliefs about slavery?A. However, notwithstanding all that has been done and written against it, that brutish barbarity, and unparalelled injustice, is still carried on to a very great extent in the colonies, and with an avidity as insidious, cruel and oppressive as ever.B. However, it cannot but be very discouraging to a man of my complexion in such an attempt as this, to meet with the evil aspersions of some men, who say, That an African is not entitled to any competent degree of knowledge, or capable of imbibing any sentiments of probity; and that nature designed him for some inferior link in the chain, fitted only to be a slave.C. By some of such complexion, as whether black or white it matters not, I was early snatched away from my native country, with about eighteen or twenty more boys and girls, as we were playing in a field.D. But the supporters and favourers of slavery make other things a pretence and an excuse in their own defence; such as, that they find that it was admitted under the Divine institution by Moses, as well as the long continued practice of different nations for ages; and that the Africans are peculiarly marked out by some signal prediction in nature and complexion for that purpose. Help. Jim runs 10 miles in 85 minutes. At the same rate, how many minutes would he take to run 8 miles? plz help In a pot of boiling water, what happens to the hot water at the bottom of the pot? What happens to the cold water at the top of the pot? The effects of deforestation include: increased soil fertility, as without trees to absorb them, the essential mineral nutrients remain in the soil. harm to downstream fisheries, due to sedimentation of waterways from increased soil erosion. increase in local rainfall and cooler temperatures, due to reduced plant respiration and transpiration. benefit to many species especially tropical and migratory species, due to habitat fragmentation. 4250cm ........... m? which organism is a producer in the mangrove swamp?A. egretB. seagrassC. snapping shrimpD. detritus Los trminos 32 , 16 , 8 , 4 ................, representan una PG .Calcular a) R b) El trmino dcimo c) La suma de los 10 primeros trminos Whats the answer to this How are gas giants different from each other Jonah tells his friend Derek that he would like to go parasailing. Derek is very enthusiastic and suggests that they try an outfit called Wind Beneath My Wings because he has heard good things about it. Derek offers to arrange everything. He makes a reservation, puts the $600 fee on his credit card, and picks Jonah up to drive him to the Wings location. What a friend! But the day does not turn out as Jonah had hoped. While he is soaring up in the air over the Pacific Ocean, his sail springs a leak, he goes plummeting into the sea and breaks both legs. During his recuperation in the hospital, he learns that Wings is unlicensed. He also sees an ad for Wings offering parasailing for only $350. Derek is listed in the ad as one of the company's owners. Required:a. Does an agency relationship exist between Derek and Jonah?b. Discuss what duties the agent had to the principal in the above example. Did the agent fulfill his duties? Why or Why not?