A school has a total of 900 pupils 400 are boys the rest are girls. What's the ratio of boys to girls? .

Answers

Answer 1

Answer:

it should be 4:5 I hope that helps

Answer 2
The answer is 4:5




Your welcome pls tell me if im wrong

Related Questions

On average, Joanne writes
9 emails per day. How long
will it take Joanne to write
279 emails?

Answers

Answer: 31 days

Explanation: You need to do 279 divided by 9 to find the amount of days it will take, and the answer is 31 days

Answer:

It will take 31 days (4 weeks and 3 days) to write 279 emails

Step-by-step explanation:

279 emails ÷ 9 emails per day = 31 total days to write 279 emails

A hockey player strikes a hockey puck. The height of the puck increases until it reaches a maximum height of 3 feet, 55 feet away from the player. The height y (in feet) of a second hockey puck is modeled by y=x(0.15−0.001x), where x is the horizontal distance (in feet). Compare the distances traveled by the hockey pucks before hitting the ground.

Answers

The total distance travelled by the first and second hockey pucks before hitting the ground is 110 feet and 150 feet, respectively.

We are given that there are two hockey pucks.The height of the first hockey puck increases until it reaches a maximum height of 3 feet when it is 55 feet away from the player.This hockey puck will travel an additional 55 feet after it reaches its maximum height before it hits the ground.The total distance travelled by the first hockey puck before hitting the ground is 110 feet.The height y (in feet) of the second hockey puck is modelled by y=x(0.15−0.001x), where x is the horizontal distance (in feet).When it hits the ground, its height will be zero.0 = x(0.15−0.001x)x(0.15−0.001x) = 0A value of "x" is 0 when it is just hit by the player.When it hits the ground, the value of "x" is :0.15−0.001x = 00.001x = 0.15x = 150The total distance travelled by the second hockey puck before hitting the ground is 150 feet.

To learn more about distance, visit :

https://brainly.com/question/15172156

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The distribution of passenger vehicle speeds traveling on a certain freeway in California is nearly normal with a mean of 71.5 miles/hour and a standard deviation of 4.75 miles/hour. The speed limit on this stretch of the freeway is 70 miles/hour. (a) A highway patrol officer is hidden on the side of the freeway. What is the probability that 5 cars pass and none are speeding? Assume that the speeds of the cars are independent of each other. (Round your answer to four decimal places.) .0074 (b) On average, how many cars would the highway patrol officer expect to watch until the first car that is speeding? (Round your answer to two decimal places.) What is the standard deviation of the number of cars he would expect to watch? (Round your answer to two decimal places.)

Answers

Answer:

a

[tex]G  =   0.007523 [/tex]

b

 The  number of cars the  highway patrol officer would watch before a  car that is seen is [tex]E(X) = 1.6027 [/tex]

The standard deviation is   [tex]s  =  0.9829 [/tex]

gg

Step-by-step explanation:

From the question we are told that

The mean is [tex]\mu = 71.5 \ miles/hour[/tex]

The standard deviation is [tex]\sigma = 4.75 \ miles/hour[/tex]

The speed limit is [tex] x = 70 \ miles /hour[/tex]

Generally the probability of getting a car that is moving with speed greater than the speed limit is mathematically represented as

[tex]p =P(X > x ) = P(X > 70) = P(\frac{X - \mu }{\sigma } > \frac{70 - 71.5 }{4.75})[/tex]

=> [tex] p= P(X > 70) = P(\frac{X - \mu }{\sigma } > \frac{70 - 71.5 }{4.75})[/tex]

=> [tex] p= P(X > 70) = P(\frac{X - \mu }{\sigma } > -0.31579 )[/tex]

Here

[tex]\frac{X - \mu }{\sigma } = Z(The \ standardized \ value \ of X )[/tex]

So

=> [tex] p= P(X > 70) = P(Z > -0.31579 )[/tex]

From the z-table

[tex]p = P(Z > -0.31579 ) = 0.62392[/tex]

So

[tex] p = P(X > 70) = 0.62392 [/tex]

Generally the probability of getting a car that is not moving with speed greater than the speed limit is mathematically represented as

[tex]q = 1 - p[/tex]

=> [tex]q = 1 - 0.62392 [/tex]

=> [tex]q = 0.37608 [/tex]

Generally the probability of getting 5 cars that are not speeding is mathematically represented as

[tex]G = q^5[/tex]

=> [tex]G = (0.37608)^5[/tex]

=> [tex]G = 0.007523 [/tex]

Generally the number of cars that the highway patrol officer is expected to watch until the first car that is speeding is gotten is mathematically represented as

[tex]E(X) = \frac{1}{p}[/tex]

=> [tex]E(X) = \frac{1}{0.62392}[/tex]

=> [tex]E(X) = 1.6027 [/tex]

Generally the standard deviation is mathematically represented as

[tex]s = \sqrt{\frac{1 - p }{ p^2} }[/tex]

=>     [tex]s  =  \sqrt{\frac{1 -0.62392 }{ (0.62392)^2} }[/tex]

=> [tex]s = 0.9829 [/tex]

The probability that 5 cars pass and none are speeding is 0.007523 and the number of cars the highway patrol officer would watch before a car that is seen is E(X) = 1.6027

What is normal a distribution?

It is also called the Gaussian Distribution. It is the most important continuous probability distribution. The curve looks like a bell, so it is also called a bell curve.

The z-score is a numerical measurement used in statistics of the value's relationship to the mean of a group of values, measured in terms of standards from the mean.

The distribution of passenger vehicle speeds traveling on a certain freeway in California is nearly normal with a mean of 71.5 miles/hour and a standard deviation of 4.75 miles/hour.

The speed limit on this stretch of the freeway is 70 miles/hour.

Generally, the probability of getting a car that is moving with speed greater than the speed limit is mathematically represented as;

[tex]p = P(X > x) = P(X > 70) = P(z = \dfrac{X - \mu}{\sigma } > \dfrac{70 - 71.5}{4.75})\\\\p = P(X > 70 ) = P(\dfrac{X -\mu}{\sigma} > -0.31579)[/tex]

From the z-table

[tex]p = P(X > 70)= P(z > -0.31579) \\\\p = 0.62392[/tex]

Generally, the probability of getting a car that is not moving with speed greater than the speed limit will be

q = 1 - p

q = 1 - 0.62392

q = 0.37608

Generally, the probability of getting cars that are not speeding will be

G = q⁵

G = 0.37608⁵

G = 0.007523

The number of cars that the highway patrol officer is expected to watch until the first car that is speeding is gotten will be

[tex]\rm E(X) = \dfrac{1}{p}\\\\E(X) = \dfrac{1}{0.62392}\\\\E(X) = 1.6027[/tex]

The standard deviation will be

[tex]\sigma = \sqrt{\dfrac{1-p}{p}}\\\\\\\sigma = \sqrt{\dfrac{1-0.63292}{0.62392}}\\\\\\\sigma = 0.9829[/tex]

More about the normal distribution link is given below.

https://brainly.com/question/12421652

HELPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!

Answers

Answer:

so

Step-by-step explanation:

the first goes 3rd

the 2nd goes 1

3rd goes 4

solve for the variable. b^2 = 100

Answers

Answer:

b = ±10

or

b = -10, 10

Step-by-step explanation:

Step 1: Write equation

b² = 100

Step 2: Solve for b

Square root both sides: b = ±10

Step 3: Check

Plug in x to verify it's a solution.

(-10)² = 100

(10)² = 100

Answer:

b=-10 or b=10

Step-by-step explanation:

They would both work because negative times negative is also positive so it would also work.

*someone deleted my answer to this question saying it was incorrect but it was correct :/

What would make the following equation true?
5m+(2m+8)=__+8

Answers

Answer:

7m

Step-by-step explanation:

Answer: 7m

Step-by-step explanation: 5m + 2m = 7m, so 5m+2m+8 = 7m+8

what is the sum of 1/3+3/6=

Answers

Answer:

5/6

Step-by-step explanation:

Please help!! ASAP!! Graph Y=3/8x-2

Answers

Answer is in the graph below.

PLZ HELP FAST!!!!!!!!​

Answers

Answer:

-6, -1, 4, -1

Step-by-step explanation:

If you plug it in thats what you get

Please I need help 20 POINTS!
The question States: come up with a story problem that matches the above representations. (There all apart of the same problem)

Answers

Mia made 18 cookies to share with her best friend at school. Each day she brought 2 cookies to share with her friend. How many days does she have to bring cookies to school?

Answer: 9

Solving Steps:

Which of the following is not true?
[tex]4\pi > 12[/tex]
[tex]\sqrt{18 } + 2 < \frac{15}{2} [/tex]
[tex]6 - \sqrt{35} < 0[/tex]
[tex] \sqrt{16} + 4 > \sqrt{4} + 5[/tex]

Answers

Answer: 6 - √35 < 0

----------------------------

In a​ week, 12 hens laid 84 eggs. What is the unit rate for eggs per​ hen?

Answers

Answer:

7 eggs per hen

Step-by-step explanation:

There were 84 eggs laid between the 12 hens. That means the 84 eggs are split among the 12 hens. 84 divided by 12 = 7.

The column headers of a formal proof are _____________ and ____________.
statements and reasons
definitions and examples
givens and conclusions
conjectures and counterexamples

Answers

Answer:

Statements and reasons

Step-by-step explanation:

Answer:

statements and reasons

Step-by-step explanation:

These headers are standard and are used on every formal proof.

HELPPP PLEASE!!!! SHOW ALL WORK!!!

Answers

Answer:

x=54

Step-by-step explanation:

these two angles are supplementary to each other. this is because alternate interior angles are congruent, and 2x+42 degrees is supplementary to the alternate interior angle of x-24 degrees. so, we can add these two numbers up and set it equal to 180.

2x+42+x-24=180

3x+18=180

3x=162

x=54

if this question is asking for x, 54 is the answer. if it is asking for the angle measures, plug in 54 for x for each angle and solve.

Write an equation of the line passing through each of the following pairs of points. c (4, 0), (−2, 8)'

Answers

Answer:

Step-by-step explanation:

First, you must find the slope of the line using the formula (y2-y1/x2-x1). For your problem that would be (8-0/-2-4)= -4/3.

Then, you would plug in the slope and the y-intercept into the slope-intercept formula (y=mx+b), where m is the slope and b is the y intercept (4).

Your answer would be y=-4/3x+4

What is five to the second power in expanded form and standard

Answers

Step-by-step explanation:

Answer:

5x5 and 5^2

Step-by-step explanation:

hope this helps.

Please help, explain and correct the mistake on the picture below, marking brainliest!

Answers

Answer:

see below

Step-by-step explanation:

2/3 x = -6

Multiply each side by the reciprocal to isolate x

3/2 * 2/3x = -6 * 3/2

x = -9

Which binomial is a factor of the following quadratic? K2-12k+36

Answers

9514 1404 393

Answer:

  (k -6)

Step-by-step explanation:

The given quadratic is a perfect square, so has one repeated binomial factor:

  k^2 -12k +36 = (k -6)^2

K-6 is the answer because the factor

Dexter got a raise in his hourly pay, from $12.75 to $16.30. Find the percent change. Round to the nearest tenth of a percent.

Answers

Answer:

27.8

Step-by-step explanation:

16.3 - 12.75 = 3.55

3.55 ÷ 12.75 = 27.8

A jet and a light plane leave the same airport at the same time and travel in opposite directions at 960 km/h and 560 km/h, respectively. In how many hours will they be 4560 km apart?

Answers

The jet travels a distance of

(960 km/h) t

after time t, while the light plane travels a distance of

(560 km/h) t

The jet is faster than the light plane, so the distance between them is

(960 km/h) t - (560 km/h) t = (400 km/h) t

so the time it takes for them to be 4560 km apart is

(400 km/h) t = 4560 km

==>  t = (4560 km) / (400 km/h)

==>  t = 11.4 h

Calories consumed by members of a track team the day before a race are normally distributed, with a mean of 1,600 calories and a standard deviation of 100 calories. If a normal curve is sketched using these data, what is the range for 3 standard deviations to the right and to the left of the mean?

Answers

Answer:

600 calories

Step-by-step explanation:

John has consumed 1600 calories out of which he has burned off 400. So the total calories for the day so far are:

1600-400

=1200 calories

He has to keep the count of calories upto 1800 per day and the consumed calories so far are 1200

So he needs to burn:

= 1800 - 1200

= 600 calories

He has to consume 600 calories more..

Hence 1000 is not a viable solution to the problem as the remaining count of calories that need to be consumed are 600 ..

Answer:

The Answer is A.

Step-by-step explanation:

Hope this helps!


Each square in the periodic table contains the element's atomic number, chemical symbol, name, and atomic mass.
True or false?

Answers

Answer:

True...

Step-by-step explanation:

Answer:

true

Step-by-step explanation:

Geometry sucks I need help im really behind

Answers

Answer:

26°

Step-by-step explanation:

[tex]m\angle WXZ = 78\degree... (given) \\\\

m\angle 2 = 2m\angle 1...(given)... (1)\\\\

\because m\angle 1 + m\angle 2=m\angle WXZ \\\\

\therefore m\angle 1 + m\angle 2=78\degree... (2)\\\\

\therefore m\angle 1 + 2m\angle 1=78\degree\\ [From\:equations\: (1)\: \&\:(2)] \\\\

\therefore 3m\angle 1=78\degree\\\\

\therefore m\angle 1=\frac{78\degree}{3}\\\\

\therefore m\angle 1=26\degree \\[/tex]

Please help me ASAP help

Answers

Check work in picture.

³√3000- ³√375 simplify​

Answers

Answer:

30√30 - 15√15

Step-by-step explanation:

I'm not 100% sure

Answer:

We can write³√3000- ³√375 as [tex]\sqrt[3]{5*5*5*2*11}-\sqrt[3]{5*5*5*3}[/tex]

[tex]\sqrt[3]{5*5*5*2*11}-\sqrt[3]{5*5*5*3}[/tex]= [tex]5\sqrt[3]{22} -5\sqrt[3]{3}[/tex]

[tex]5\sqrt[3]{22} -5\sqrt[3]{3}[/tex] is the simplest form of ³√3000- ³√375

18x-(3x+9) expression and equations​

Answers

Answer:

15x−9

Step-by-step explanation:

The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog.
If the veterinarian gives a 30-pound dog 5 milligram of the medicine, which equation relates the weight, w, and the
dosage, o?

Answers

Question: The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog. If the veterinarian gives a 30-pound dog 3/5 milligram of the medicine, which equation relates the weight,w, and the dosage, d?

Answer: d= 1/50w

Explanation: I took the test in Edgenuity.

Hope this helps!

A certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 90​% of the time when the person has the virus and ​15% of the time when the person does not have the virus.​ (This 15​% result is called a false positive​.) Let A be the event​ "the person is​ infected" and B be the event​ "the person tests​ positive." ​(a) Using​ Bayes' Theorem, when a person tests​ positive, determine the probability that the person is infected. ​(b) Using​ Bayes' Theorem, when a person tests​ negative, determine the probability that the person is not infected.

Answers

Answer:

a)  P[A/B] = 0,019     or     P[A/B] = 1,9 %

b)  P[A- /B-] = 0,9996       or    P[A- /B-] = 99,96 %

Step-by-step explanation:

Bayes Theorem :

P[A/B]  =  P(A) * P[B/A] / P(B)

The branches of events are as follows

Condition 1        real infection     1/300        and     not infection  299/300

Then

1.-    1/300      299/300

When the test is done   (virus present)  0,9 (+)    0,15 (-)

2.-   299/300

When the test is done  ( no virus )   0,15  (+)     0,85 (-)

Then:

P(A) = event person infected          P(B)  =  person test positive

a) P[A/B]  = P(A) * P[B/A] / P(B)

where   P(A)  = 1/300  =   0,0033   P[B/A] = 0,9    

Then P(A) * P[B/A] =  0,0033*0,9  =  0,00297

P(B)   is    ( 1/300 )*0,9  +  (299/300)*0,15

P(B) = 0,0033*0,9 + 0,9966*0,15    ⇒  P(B) = 0,1524

Finally

P[A/B] =  0,00297 /0,1524

P[A/B] = 0,019     or     P[A/B] = 1,9 %

b) Following sames steps:

P[A- /B-] = (299/300) * 0,85  / (299/300) * 0,85 + (1/300 * 0,1)

P[A- /B-] = 0,8471 /0,8474

P[A- /B-] = 0,9996       or    P[A- /B-] = 99,96 %

37 degree 79 degree what is the value of n

Answers

Answer:

64

Step-by-step explanation:

The angles all add up to 180. 37 plus 79 is 116. 180-116=64.

Hope this helped! If it did, please let me know by marking it the brainliest!

A hot air balloon was rising at a rate of 474 feet per minute (ft/min). convert this speed to meters per second (m/s).

Answers

2.41 meter per second
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