20% of the people in a school hall are teachers and the rest are pupils. 75% of the pupils are boys and there are 72 more boys than girls. How many boys must leave the hall so that 20% of the people in the hall ar boys?​

Answers

Answer 1

Answer:36



im pretty sure when I looked it up it said

Answer 2

Answer:

hahahha

Step-by-step explanation:


Related Questions

Jovani has 144 feet of fencing to make a rectangular garden in his backyard. he wants the length to be 32 feet more than the width. find the width.

Answers

The width of rectangular garden comes out to be 20 feet .

Let the width be x feet .

Therefore , length is ( x + 32 ) feet .

Formula for perimeter of a rectangle :

perimeter = 2 ( length + breadth )

By substituting the values in the formula above , the equation becomes ,

2 ( x + x + 32 ) = 144

2 x + 32 = 144 / 2

     2 x = 40

        x = 20

Hence , width = 20 feet , length = 52 feet .

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What is the greatest common factor of 27 and 36?

Answers

Answer:

9!

Step-by-step explanation:

Answer: 9

Step-by-step explanation:So you look at whatever can be multiplied to get 27 or 36. When you do that 9 is your biggest number

A company designs a new water pitcher. They take a picture of the pitcher for their promotional materials. What is the approximate area filled by the water in the picture on the flyers? The picture shows the outline of a pitcher. The height of a pitcher's body is 12 in, and the height from neck to top is 4 in. The width of the bottom is 8 in, the neck is 3 in, and the top open is 5 in.

Answers

Answer:

32in2

Step-by-step explanation:

The triangles are congruent by SSS and HL.

Triangles R S T and V W X are shown. Triangle R S T can be rotated about point S and then shifted down and to the left to form triangle V W X.

Which transformation(s) can be used to map △RST onto
△VWX?

Answers

Using translation concepts, the transformations that are used to map △RST onto △VWX are:

Rotation, then a translation.

What is the missing information?

The two triangles are given at the end of the answer.

What is a translation?

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s definition or in it’s domain. Examples are shift left/right or bottom/up, vertical or horizontal stretching or compression, and reflections over the x-axis or the y-axis.

Looking at the image, we have that:

The orientation of the triangle changed, hence it underwent a rotation.After the function underwent the rotation, it was moved up and right, then it underwent a translation.

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Aiden surveyed 300 of the students in his school about their favorite color. 85% said their favorite color was red. How many students favorite color was red?

Answers

The number of people who like red color is 255 students when 85% said their favorite color was red.

What is percentage?

Percentage, a relative value indicating hundredth parts of any quantity. One percent (symbolized 1%) is a hundredth part; thus, 100 percent represents the entirety and 200 percent specifies twice the given quantity. percentage.

Given:

Total students =300

85% said their favorite color was red.

So, students whose favorite color was red

=85/100 *300

=85*3

= 255 students.

Hence, 255 students whose favorite color was red

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HELP...................................! !

Answers

Answer:

Your answer would be 3.075.

Step-by-step explanation:

15 - 6.8 = 8.2

8.2 - 5 1/8 = 3.075

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

Hope this helps!

Have a great day and God bless! :)

Wayne placed an order for 1 2/3 sacks of brown lentils and 1/2 of a sack of green lentils. How much more brown lentils did Wayne order?

Answers

Answer:

1 1/6

Step-by-step explanation:

1 2/3 - 1/2 =

1 2/3 = 1 4/6

1/2 = 3/6

1 4/6 - 3/6 =

1 1/6

Write the equation of a line that passes through point (16,7) with slope 5/4 in point slope form

Answers

Answer: y = 5x/4 - 13

Step-by-step explanation:

y=mx+b

7=5/4 *16+b

7=5*16/4 +b

7=80/4+b

7=20+b

b=-13

y = 5x/4 - 13

Dendra's boat uses 3 gallons of gas in 4 hours. How many gallons of gas will she use in 15 hours?

Answers

Answer:11.25

Step-by-step explanation:because we have to find out how many gallons we have in one hour so you divide both sides by 4

4/4 is 1 hour

3/4 is 0.75 gallons then you have to multiply both sides by 15

1 hour times 15 is 15 hours

the 0.75 x 15 is 11.25

so the answer is 11.25 gallons that she uses in 15 hours

hope this helps

write a function g whose graph is a reflection in the x axis of the graph of f(x)=|x|-5

please help

Answers

A function g whose graph is a reflection in the x axis of the graph of f(x) = |x| - 5 is g(x) = 5 - |x|

The question asks to find a function g, that is, g(x)

The graph of g(x) is a reflection in the x axis of the graph of  f(x) = |x| - 5

Reflection of a function in the x-axis gives us

y = g(x) = - f(x)

=> g(x) = - ( |x| - 5 )

=> g(x) = - |x| + 5

=> g(x) = 5 - |x|

Therefore, using the concept of reflection of a function in x axis of the graph of the given function, we get a function g whose graph is a reflection in the x axis of the graph of f(x) = |x| - 5 as g(x) = 5 - |x|

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which of these expressions are equal?
I. 4.86x0.01
II.48. 6x 0.1
III. 0.0486x100
IV.48.6x10

Answers

Answer:

II. 48.6×0.1

III. 0.0486×100

Step-by-step explanation:

48.6×0.1 = 4.86

0.0486×100 = 4.86

Answer:

ll and lll are equal.

Step-by-step explanation:

4.86x0.01 = 0.0486

48.6 x 0.1 = 4.86

0.0485 x 100 = 4.86

48.6 x 10 = 486

A snack recipe calls for 1 1/4 cups of dip and 1/5 cup of chips. charlie wants to make the same recipe using 1 cup of chips. how many cups of dip will charlie need?

Answers

Using the concept of ratio the number of cups of chips Charlie needs can be found out.

What is ratio?

A ratio in mathematics shows how many times one number is contained in another. The ratio symbol is represented by a colon (:).A ratio is still valid if all of the quantities are multiplied by the same number. By dividing each quantity by the sum of all the numbers' common factors, ratios can be lowered (much like fractions are). The simplest version of a fraction is one in which the ratio's numbers are the smallest feasible integers.

Amount of dip required by the recipe be 'a' =[tex]1\frac{1}{4}[/tex] cups=[tex]\frac{5}{4}[/tex]cups

Amount of chips required by the recipe be 'b'= [tex]\frac{1}{5}[/tex]cups

Amount of chips to be used be 'c'= 1 cup

Number of cups of chips Charlie needs

=[tex]\frac{c*a}{b}[/tex]

=[tex]\frac{1*\frac{5}{4} }{\frac{1}{5} }[/tex]

=[tex]\frac{5*5}{4}[/tex]

=[tex]\frac{25}{4}[/tex] cups

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Amir has 2 checking accounts. The first has a balance of -$20 and the
second has a balance of $160. What is the sum of the two sum balances

Answers

Answer:

D. 140. ....,.....

Step-by-step explanation:

160-20=140

Factor. x^2-x=20
HUGE POINTS WOWZIE WOOZA

Answers

Answer:

(x-5)(x+4) = 0

Step-by-step explanation:

Pre-SolvingGiven

We are given the quadratic equation x²-x=20

And we want to factor it, meaning that we want to split it apart, usually to make it easier to solve.

Solving

First, let's subtract 20 from both sides, as when all 3 terms of a quadratic equation are on the same side, it makes it a lot easier to solve.

x² - x = 20

    -20  -20

_______________

x² - x - 20 = 0

Now, we can get on to factoring.

In a quadratic equation, written as ax² + bx + c = 0 (like in here), b (the coefficient in front of just x, not x²) is equal to the sum of two numbers, while c is the product of the same two numbers.

The coefficient in front of x (b) is -1, and c is equal to -20.

Now think: which two numbers add up to -1, and multiply to equal -20?

Those numbers are -5 and 4.

Now, to factor a quadratic, we split it up into 2 binomials multiplied by each other, and each binomial is x + one of the numbers we found above. It looks like this: (x+1)(x+2). Remember that this only affects the left side; the right side stays the same.

In this case, we have -5 and 4, which will take the place of 1 and 2 in the example above.

Therefore, the factored form of x² - x - 20 = 0 is (x-5)(x+4) = 0.

I cant find my answer help needed

Answers

Step-by-step explanation:

the domain is the interval or set of all valid x (input) values.

the range is the interval or set of all valid y (function result) values.

so, we see here, x goes from -2 to +2.

and y stays between -5 and -1.

the hole point at (-2, -1) means the point itself is not included. the full point (2, -1) means the point itself is included.

the domain is

-2 < x <= +2

"-2 < x" because (-2, -1) is not included.

"x <= +2" because (2, -1) is included.

the range is

-5 <= y <= -1

"y <= -1" because for the included point (2, -1) y can reach -1, even though (-2, -1) is excluded.

Elliot uses 3/8
pound of clay to make a charm for a necklace. How much clay does he use to make

Answers

Answer:

five thousand clay to school

3/2 pound of clay is used.

A kite of area 252 m² has one diagonal of length 9 m. Find the length of the other diagonal

Answers

Answer:

The other diagonal of the kite is 56 meters

Step-by-step explanation:

To find the length of the other diagonal you find to know the formula for finding the area of a kite which is A = (p×q)/2. It is given that the area is 252m² and one diagonal is 9m.

Place your given numbers in the formula for the area of the kite. With your numbers given the formula is 252 = (9q)/2 or alternatively 252 = (9p)/2Multiply both sides by 2 the reason being is that we are trying to islolate the unknown variable (weather it is p or q) so we are doing the inverse operation. So you will have 252 × 2 = (9p)/2×2 or (9q)/2×2. At the end of this step it is 504 = 9q or 504 = 9pDivide by 9 on both sides remember that the point is to islolate the variable. 504/9 = 9q/9 or 504/9 = 9p/9. The final answer is that your unknown diagonal (whether it was q or p) is 56 m

Express this number in scientific notation.
0.00067

Answers

Answer: 6.7 x 10^-4 :)

The points L, M, N and O all lie on the same line segment, in that order, such that the ratio of LM:MN:NOLM:MN:NO is equal to 5:1:2.5:1:2. If LO=48,LO=48, find NO.NO.

Answers

The length of the line segment NO is 12 units

How to determine the length of NO?

The ratios of the line segments are given as:

LM : MN : NO = 5 : 1 : 2

The length of LO is given as:

LO = 48

The above means that

NO = (NO Ratio)/(Total Ratio) * LO

So, we have

NO = 2/(5 + 1 + 2) * 48

Evaluate the product

NO = 12

Hence, the length of NO is 12 units

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Find the least common denominator for these fractions. Enter your answer in the space provided. 1/2 and 2/9

Answers

Answer:

18.

Step-by-step explanation:

2 = 2

9 = 3*3

So, the LCD = 2*3*3     (no duplicates in the 2 lists).

= 18.

can someone answer 2 1/2 x 1 3/5 =

Answers

The answer is 4.

First, multiply 2 by and add that one to get 5/2. Then, multiply 1 by 5 and add the 3 to get 8/5

Singing star bitsy carlyle isnt as popular as she used to be at her latest concert she was only able to sell 910 tickets for a total of 15620 barely enough to pay her agent if regular seats cost 18.50 and mezzanine seats the only other option cost 16.25 how many mezzanine tickest were sold

Answers

The number of mezzanine tickets sold = 540

Total number of tickets sold = 910

Total number of tickets sold is the sum of the number of regular seats and the number of the mezzanine seats sold.

Let 'x' be the number of regular seats and 'y' be the number of mezzanine seats.

Then x + y = 910     ----------(1)

Cost of a regular seat = $ 18.50

So cost of x regular seats = 18.50x dollars

Cost of a mezzanine seat = $ 16.25

So cost of y mezzanine seats = 16.25y

Total amount of money she got by selling tickets = $ 15620

Therefore, 18.5x + 16.25y = 15620 ----------------(2)

Solve equations (1) and (2) for x and y.

Multiplying (1) with 18.5 throughout,

18.5x + 18.5y = 16835 ---------------(3)

Subtracting (2) from above equation (3), we get,

(18.5 - 16.25)y = 16835 - 15620

⇒ 2.25y = 1215

⇒ y = 1215/2.25

y = 540

Hence 540 mezzanine tickets were sold.

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HELP!!
What is the volume of this solid?
A. 39
B. 108
C. 27
D. 63

Answers

Answer: B

Step-by-step explanation:

4 times 3 times 3 times 3 times 3=108

Answer:

A. 39

Step-by-step explanation:

Given:

Length of a pyramid (lpy ) = 4 cm

Width of a pyramid (wpy ) = 3 cm

Height of a pyramid (hpy ) = 3 cm

It is given that the rectangular pyramid fits exactly on top of the prism, the length and width of the prism are the same for the base of the pyramid.

So, Length of a prism (lpr) =3 cm, width of a prism (wpr) = 3cm and height of a prism (hpr) = 3 cm

Volume of Prism (Vpr) = lpr × wpr × hpr

⇒ Vpr = 3 cm × 3 cm × 3 cm

⇒ Vpr = 27 cm³ ....(eq 1)

Volume of Rectangular Pyramid Vpy

= (lpy × wpy × hpy ) / 3

⇒ Vpy = (4 × 3 × 3) ÷ 3

⇒ Vpy = 12 cm³ ....(eq 2)

From 1 and 2, Volume of composite space,

Volume of composite space = Volume of prism + Volume of Pyramid

⇒ V = 27 cm³ + 12 cm³ = 39 cm³

⇒ V = 39cm³

Write a numerical expression for the verbal expression. eighteen divided by the sum of two and seven

Answers

The numerical expression for the verbal expression is 18 ÷ (2+7).

Given,

Verbal expression = Eighteen divide by the sum of two and seven

we know that ,

We can write any  verbal expression  to numerical expression by using playing with numbers.

Playing with numbers:

Playing with numbers involves activities like arranging the numbers, understanding , finding out whether a given number is a factor of another number or a multiple of another number, and understanding the properties of factors and multiples

Now, According to question

Eighteen divided by the sum of two and seven

18÷(2+7)

Therefore,

The numerical expression is 18÷(2+7).

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There was a country concert held at the park. For every 5 men there were 7 women that went to the concert. If 40 more women attended the concert than men, how many men and how many women attended the concert? Use the following diagram to help solve the ratio problem.

Answers

Step-by-step explanation:

i think it is 35 but im probaly wrong

Glen rolls a biased dice 400 times.
The results are shown below in the table.

Score Frequency
1 95
2 134
3 45
4 26
5 75
6 25
Jake rolls the same dice 720 times.
Estimate how many 5's he can expect to get. Answer

Answers

When Jake rolls the same dice 720 times, the number of 5s will be 135.

How to illustrate the information?

It should be noted that the frequency for 5 is 75 out of 400. This will be:

= 75 / 400

= 3/ 16

Therefore, when Jake rolls the same dice 720 times, the number of 5s will be:

= 3/16 × 720

= 135

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Answer both questions please [ brainliest ]
-
1. The measure of an angle is 84°. The measure of its complementary angle is ___
degrees.

2. The measure of an angle is 29°. The measure of its supplementary angle is ___ degrees.

Answers

Answer
For question 1 the answer is
6 degrees

For question 2 the answer is
151 degrees


I got #1 by taking 90 and subtracting 84 to get 6 degrees

I got #2 by taking 180 and subtracting 29 to get 151 degrees

A 1971 Indian Motorcycle is worth 30 times its original cost. Today it is worth $3000. How much did it originally cost in 1971?

Answers

Answer: $100

Step-by-step explanation:

3,000 divided by 30 is 100

Answer: 100

Step-by-step explanation: divide 3,000 by 30

How do you regular divide

Answers

Answer:

These are dividend, divisor, quotient and remainder.

Step-by-step explanation:

Determine the first digit or set of digits your divisor will go into at least once.

Determine the maximum number of times your divisor will go into the said digit or digits.

Place the answer over the corresponding digit. For multiple digits, place it over the last digit.

Multiply the answer from above by your dividend.

Place the result under your dividend starting from the left most digit.

Subtract the result from your dividend. Only subtract the digits that line up. For instance, if you have a five digit dividend, but the result is only two digits, only subtract using the first two digits of your dividend.

Bring down the next digit of your dividend beside the result.

Repeat the process using the new set of digits. Each time, bring down the next digit of your dividend.

The difference of 7 and the product of 2 and a number.

Answers

-7+2.x is your answer
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Help if you can please help Moral of the story The Big Story by George Loveridge imagine that the nation has just entered an unexpected recession. place the following items in the order in which we would expect them to occur according to a textbook approach to monetary policy. ASP 50Hello! Please read these theories on How the Native Americans Migrated. Choose one and tell me why you agree with it.First TheoryArcheologists have thought they knew how ancient humans arrived on the American continentfor about the past 50 years. As of 2008, genetic findings are suggesting that a single populationof modern humans migrated from southern Siberia toward the land mass known as the BeringLand Bridge as early as 30,000 years ago, and crossed over to the Americas by 16,500 years ago.Archaeological evidence shows that by 15,000 years ago, humans had made it south of theCanadian ice sheets. As the ice caps in Canada began to melt, a path southward emerged.Archeologists call these people Clovis, after some stone tools from the era were found nearClovis, New Mexico in the 1920s and 1930s . This may be the earliest migration the scientistshave uncovered but it certainly isnt the only one.Second TheoryFrom the 1930s all the way to the 1990s. The Clovis people were thought to be the onlymigration theory. In 1997, archeologists made a discovery of an archaeological site in MonteVerde, Chile, dating back to 14,500 years ago - a full millennium older than what was previouslythought to be the first people in the new world, and indicating they settled much further souththan expected. These new finding sparked much debate about the first humans migrating to theAmericas. Many new questions were asked. Did they in fact come across the Bering LandBridge? Could they have arrived in South America via a different route?Intense criticism also rained down on competing theories of how people arrived, such as the ideathat early Americans might have skirted the coastline in boats, avoiding the Bering land bridgeentirely. I was once warned not to write about coastal migration in my dissertation. My advisersaid I would ruin my career, says Jon Erlandson, an archaeologist at the University of Oregon inEugene.Third TheoryThe Third theory is viewed as the more radical theory. This theory claims it is possible that thefirst Americans didn't cross the Bering Land Bridge at all and didn't travel by foot, but rather byboat across the Atlantic Ocean. Though the evidence for this theory is minimal, proponents arguethat the artifacts were developed by an earlier and still more ancient European group, known asthe Solutrean culture. This style bears an uncanny resemblance to that of the Clovis tools foundin the United States, which could suggest that humans may have entered America from the eastover a route that has been dubbed the Atlantic Maritime route. This theory looks at writing andlanguage of the time. Many scientists claim the people of the time had similar characteristics totribes in Australia and Southeast Asia. Support for this idea is found partially in the discovery ofa 9,500-year-old skeleton in Washington State. 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