Del total de alumnos de una escuela de Medellín, la mitad nació en Medellín, un tercio en otros pueblos de Antioquia y los restantes en otros países. Si son 83 los alumnos extranjeros, el número de alumnos que nacieron en Medellín es: A. 498 B. 166 C. 250 D. 249

Answer:

x=8/7, y=-25/7, z=15/7

Step-by-step explanation:

x-y+2z=9 ==> equation 1

3x+y=z=2 ==> equation 2

2x-y+z=8 ==> equation 3

  3x+y+z=2

+ (2x-y+z=8)

3x+2x + y+(-y)  + z+z = 2+8  ==> add equation 2 and 3 to eliminate y

 5x + 2z = 10  ==> equation 4

  x-y+2z=9

- (2x-y+z=8)

x - 2x + (-y)-(-y) + 2z-z = 9-8 ==> subtract equation 1 and 3 to eliminate y

-x + 0 + z = 1  ==> Let's say -y=a. (-y)-(-y) = a-a = 0.

(-x + z = 1)*2 ==> multiply by 2 to get z to become 2z

-2x + 2z = 2  ==> equation 5

   5x + 2z = 10

- (-2x + 2z = 2)

5x-(-2x) + 2z-2z = 10-2 ==> subtract equation 4 and 5 to solve for x

5x+2x = 8

7x = 8  ==> divide both sides by 7 to isolate x

x = 8/7

-2(8/7) + 2z = 2  ==> plugin x into equation 5 to solve for z

-16/7 + 2z = 2 ==> simplify

(-16/7 + 2z = 2)*7  ==> multiply the equation by 7 to eliminate fractions

-16 + 14z = 14

14z = 30  ==> add 16 on both sides to isolate z

z = 30/14  ==> divide each side by 14

z = 15/7  ==> simplify

2(8/7)-y+(15/7)=8  ==> plugin x = 8/7 and z = 15/7 into equation 3

16/7 - y + 15/7 = 8

(16/7 + 15/7 - y = 8)*7  ==> multiply the equation by 7 to remove fractions

16 + 15 - 7y = 56

31 - 7y = 56

-7y = 25  ==> subtract 31 on both sides to isolate y

7y = -25

y = -25/7

Answer: (x=8/7, y=15/7, z=-25/7)

While measuring mass of precious substances, such as gold, silver, etc., we need to be accurate in our measurement. in competitions and events, a difference of second can make you lose or win the game. Thus, accurate time measurement in such cases is very important.

Precision measures the reproducibility of measurements, even when they are far from the acceptable value, whereas accuracy measures how near a measurement is to a known or accepted value. Repeatable measurements that are reliable and precise are extremely near to the real values.

How closely a measured value resembles the real (or "true") value is referred to as accuracy. For instance, an accurate reading for the weight would be as near to 100g as feasible if you weighed a typical 100g weight on a scale.

Learn more about  accurate measurement to visit this link

https://brainly.com/question/13139257

#SPJ4

Answer:

528,672

Step-by-step explanation:

A=P(1+r)^t

360,000(1+.03)^13 = 528,672.1368

Rounded: 528,672

Thousands, hundreds, tens and ones are four types of values and there are many more.

Value in mathematics is a number that represents the outcome of a computation or function. In the aforementioned example, you may inform your teacher that 5 + 6 Equals 30 or that x + y = 9 if x = 6 and y = 3. A variable or constant can also be referred to as a value.

The number 4 is in this case in the tens column. As a result, the place value of the number four is tens or tens.

Thousands, hundreds ,tens and ones are four types of values and there are many more like ones etc. Moreover after solving any problem for unknown variable the resulting numerical solution can also be termed as value.

To learn more about value visit the link:

http://brainly.com/question/843074

#SPJ4

Answer:

42 divided by 2

Step-by-step explanation:

42 divided by 2 equals 21 and how to find if it is correct is to add it together 21+21 or multiply it by what it was divided by 21x2

The annual income of Juan Vance is $12,955.17.

A percentage is a value per hundredth. Percentages can be converted into decimals and fractions by dividing the percentage value by a hundred.

In order to pay for Social Security and Medicare, the Federal Insurance Contributions Act(FICA) mandates payroll deductions from both employers and employees.

Given, Juan Vance's Weekly salary is $231.67.

∴ Annually Juan earns $(52×231.67) = $12,046.84.

FICA deducts 7.51% from it and then combines another 7.51% with the employee,

∴ The net annual income of Juan Vence is

= [{12046.84 - (7.51/100)×12046.84 + {(7.51 + 7.51)/100}×12046.84}]

= (12046.84 - 904.71 + 1813.04}.

= $12,955.17

learn more about percentages here :

https://brainly.com/question/24159063

#SPJ1

The value of the expression after simplification is found as 415.

To simplify simple means to make anything easier. In mathematics, simplifying an equation, fraction, or problem means taking it and making it simpler.

Calculations and problem-solving techniques simplify the issue.

We can —

The given expression is-

= 20 x 19 + 5 x 7

Applying the BODMAS, multiply the numbers.

= 380 + 35

Add the values,

= 415

Thus, the value of the expression after simplification is found as 415.

To know more about the simplification, here

https://brainly.com/question/723406

#SPJ4

The correct question is-

What is the value of the following expression 20 x 19 + 5 x 7?

Actual parameters are those that are supplied into a function when it is called or those that are used to make a function call.

Using parameters, subprograms pass information. The variables or expressions listed in a subprogram call's parameter list are the real parameters.

For instance, the procedure call that follows lists the two real parameters amount and emp num:

raise_salary(emp_num, amount);

The parameters that are used when calling a function at any point in the code are the actual parameters. It is the real value that a caller has given the process. When a subroutine like Functions is invited, the parameters are what you decide.

To learn more about parameters here:

https://brainly.com/question/14618066

#SPJ4

The roots of the quadratic equation x^5 - x^2 = 0 are x = 0 and x = ±√2, which can be found by factoring and setting each factor equal to 0. The quadratic can be factored into (x^2)(x^3 - 1) = 0 and then the factors can be set equal to 0, resulting in x = 0 and x = ±√2.

To find the roots of the quadratic equation x^5 - x^2 = 0, first we must factor the equation. To do this, we can recognize that there are two terms, x^5 and x^2, and that the exponents are both greater than 1, so we can factor out an x^2 from both terms. When we do this, we get (x^2)(x^3 - 1) = 0. Now we can set each factor equal to 0, so that x^2 = 0 and x^3 - 1 = 0. Solving for x in the first equation, we get x = 0. To solve for x in the second equation, we can add 1 to both sides, so that x^3 = 1. Taking the cube root of both sides, we get x = ±√2. Therefore, the roots of the quadratic equation x^5 - x^2 = 0 are x = 0 and x = ±√2.

x^5 - x^2 = 0

x^2(x^3 - 1) = 0

x^2 = 0 → x = 0

x^3 - 1 = 0 → x^3 = 1 → x = ±√2

Learn more about equation here

https://brainly.com/question/29657992

#SPJ4

Frequently between the ages of 17 and 18, students. Seniors are students in the twelfth grade. The 12th grade, or senior year of high school, is frequently considered by students.

Exams, projects, and academic assignments are evaluated by graders, who also issue grades. They create test materials, quizzes, and other things. They develop or implement the grading criteria and system. Either hand grading or the usage of an electronic evaluation and grading application are options for them.

here ,

Students are typically between the ages of 17 and 18. Seniors are the term for students in the twelfth grade.

Twelveth grade, or senior year of high school, is often seen by students as a time to unwind and get ready to leave their old lives behind and enter either college or the workforce.

To know more about grader visit :-

https://brainly.com/question/14922075

#SPJ4

Yes, the integer is divisible by 3.

To determine if r is divisible by 3, we must first determine the value of r. According to statement 1, r is the product of 4 consecutive positive integers.

This means that the 4 integers must be increasing by 1 each time. The smallest integer must be 1, and the 4th integer must be 4 higher than the first, making it 5.

The product of these 4 integers is 1 x 2 x 3 x 4 = 24, which is less than 25.

Since 24 is divisible by 3, r is also divisible by 3.

For more questions like Integers click the link below:

https://brainly.com/question/1768255

#SPJ4

Answer:

$24

Step-by-step explanation:

50% of 40 = 20

10% of 40 = 4

20+4=$24

The Median of the following observation set 5 7 10 12 11 will be 10.

One measure of central tendency is the median. The median is the number that lies in the middle of the specified range of integers. It separates the higher half from the lower half of a particular data sample. At least half of the observations are above or equal to the median, and at least half of the observations are below the median.

The median can be calculated as follows when there are odd numbers of observations in a data collection:

First, arrange the data in ascending or descending order.

Step 2: If the number of observations (let's say n) is odd, the middle observation is the median of the given data.

Median = [tex](\frac{n+1}{2} )^{th}[/tex] Observation.

Here n = 5, So median will be 3rd term that is 10.

Learn more about Median:

brainly.com/question/28060453

#SPJ4

The ratio of milk to water in the mixture is 12:5, which means that for every 12 parts of milk, there are 5 parts of water. We can set up a proportion to solve for the amount of milk in the mixture. Let's call the amount of milk x.Then the proportion is:(12 parts milk) / (5 parts water) = (x liters milk) / (144 liters water)To solve for x, we can cross-multiply and simplify:12x = 5 * 144

x = (5 * 144) / 12

x = 60 litersThus, the amount of milk in the mixture is 60 liters.

According to the question,

ratio amount of water : milk is 5:12

given amount of water in the mixture is 144 litre,

then we have to find the value of x,

as given, 12x=144

                   x=144/12

                   x=12

or, 5(12) = 60litre.

For more information about ratios, see

https://brainly.com/question/23431895

Assuming that x and y be inversely proportionate, we can denote their relationship as x  ∝1/y. It follows that as the value of x rises, the value of y falls, and vice versa.

We need to figure out the proportionality constant k, which is similar to the a directly proportional connection.

Thus, x  ∝1/y

x = k/y

k = xy.

Know more about the inverse ratios and proportions, here

https://brainly.com/question/12024093

#SPJ4

5 and 1/2 pounds of jelly beans can be shared with 22 friends.

The process of converting phrases into equations and then solving those equations is known as solving algebraic word problems. Simple arithmetic procedures will be all that is required to write the equations. a single variable, and. In a real-world situation, the variable often stands for an unknowable quantity.

Given that,

Total pounds of jelly beans = five and a half pounds

Jelly beans to be given to each friend = 1/4 of a pound

Let x be the number of friends,

x = 5 and 1/2 pounds / 1/4 of a pound

Since 1 pound = 1/4 * 4

then, 5 and 1/2 pounds = 4*5 + 2 = 22

Therefore, 5 and 1/2 pounds of jelly beans can be shared with 22 friends.

To know more about algebraic word problems visit: brainly.com/question/17067890

#SPJ4

Given that,

Total pounds of jelly beans = five and a half pounds

Jelly beans to be given to each friend = 1/4 of a pound

Let x be the number of friends,

x = 5 and 1/2 pounds / 1/4 of a pound

Since 1 pound = 1/4 * 4

then, 5 and 1/2 pounds = 4*5 + 2 = 22

Therefore, 5 and 1/2 pounds of jelly beans can be shared with 22 friends.

Answer: 3 pieces of pie

Step-by-step explanation:

You gave Joe two pieces at first, then you gave joe another piece of pie

2 + 1 = 3 pieces of pie

Answer:

F

Step-by-step explanation:

[tex]x^4+4x^3-3x^2-12x=x^3(x+4)-3x(x+4)=(x^3-3x)(x+4) \\ \\ \therefore \frac{x^4+4x^3-3x^2-12x}{x+4}=x^3-3x[/tex]

The commutative property of addition states that a + b = b + a and the commutative property of multiplication states that a × b = b ×  a and the associative property of addition states that (a + b) + c = a + (b + c) and the associative property of multiplication states that: (a × b) × c = a × (b ×  c).

Commutative Property - The Commutative Property is derived from the word commute, which means to move. It states that the product or sum of two numbers do not change even if the places of numbers are changed or if the numbers move from one place to another. The commutative property of addition states that a + b = b + a and the commutative property of multiplication states that a × b = b ×  a.

Associative Property - It is related with the grouping of numbers. It states that the product or sum of three numbers do not change even if the grouping of numbers are changed. The associative property of addition states that (a + b) + c = a + (b + c) and the associative property of multiplication states that: (a × b) × c = a × (b ×  c).

To know more about commutative and associative property here:

https://brainly.com/question/29279825#

#SPJ4

Answer:

P(X, Y) = [(x1 sin 2A + x2 sin 2B + x3 sin 2C)/ (sin 2A + sin 2B + sin 2C), (y1 sin 2A + y2 sin 2B + y3 sin 2C)/ (sin 2A + sin 2B + sin 2C)]

Step-by-step explanation:

How to Construct Circumcenter of a Triangle?

The circumcenter of any triangle can be constructed by drawing the perpendicular bisector of any of the two sides of that triangle. The steps to construct the circumcenter are:

Step 1: Draw the perpendicular bisector of any two sides of the given triangle.

Step 2: Using a ruler, extend the perpendicular bisectors until they intersect each other.

Step 3: Mark the intersecting point as P which will be the circumcenter of the triangle. It should be noted that, even the bisector of the third side will also intersect at P.

Answer:

[tex]Lengths:8m and 11m[/tex]

Step-by-step explanation:

Area of a triangle is [tex]\frac{1}{2}bh[/tex]

[tex]44=\frac{1}{2} (x+3)(x)\\[/tex]

[tex]44=\frac{1}{2} (x_{2 +3x)[/tex]

[tex]88=x^{2} +3x[/tex]

[tex]x^{2} +3x-88=0[/tex]

[tex](x+11)(x-8)=0[/tex]

[tex]x=8[/tex]

[tex]Lengths:8m and 11m[/tex]

Answer:

17/2

Step-by-step explanation:

Work backwards. you have 10, then opposite of subtract 7 is add 7 which gives you 17. then opposite of double is half getting you 8.5 or 17/2

Answer:

Your number is 8.5 or 17/2

Step-by-step explanation:

Let's say your number is equal to the variable n.

Then we can set up an equation for this scenario: 2n - 7 = 10

Now, we need to use algebra to solve:

2n - 7 = 10 → add 7 to both sides

2n = 17 → divide both sides by 2

n = 17/2 = 8.5

Thus, the number you were thinking of was 8.5, or 17/2

The partial fraction expansion of the rational function

f(s) = 7s²+30s+27s/3+9s is 7s/9 - 164/81s + 27 + 164/27

In math the term partial fraction is defined as a method that is used to split the complicated fraction into a simpler form.

Here we have given the rational function f(s) = 7s²+30s+27s/3+9s.

And we have to find the partial fraction expansion for the function.

While we looking into the given rational function, for the given function we have to perform the partial fraction decomposition of

=>  f(s) = 7s²+30s+27s/3+9s.

And it can be simplified as,

=> f(s) = 7s²+57s/3+9s.

Take s as common on the numerator, then we get

=> f(s) = s(7s + 57) / 3 + 9s

Since the degree of the numerator is not less than degree of the denominator, perform synthetic division, then we get the result as

=> f(s) = 7s/9 + 164/27 + [-164/9]/9s + 3

When we further simplify this expression, then we get,

=> f(s) = 7s/9 + 164/27 - 164/81s + 27

To know more about Expression here.

https://brainly.com/question/14083225

#SPJ4

Therefore , the  probability that an endure all battery selected at random will last more than 550 hours is 0.0301.

Probabilities can be expressed as proportions with a 0–1 range or as percentages with a 0%–100% range. If an event has a probability of 1, it is very certain to occur; if it has a probability of 0, it has no chance of occurring. There are 45 chances out of 100 that an event will occur when its probability is 0.45 (45%).

Here,

let say this variable is X.

so we have to find P(X>575)

=> P((X-500)/40 > 1.88)

=> P(Z>1.88)

=> 1 - P(Z<1.88) = 0.0301

Therefore , the  probability that an endure all battery selected at random will last more than 550 hours is 0.0301.

To know more about probability , visit

https://brainly.com/question/11234923

#SPJ4

Answer:

yes

Step-by-step explanation:

do you want names for online ones

The scenario in this problem is described as follows:

There are 50 total animals in the barn, and there are 160 legs in total.

The system of equations that describes this situation is given as follows:

The variables that describe the system of equations are given as follows;

There are 50 total animals in the barn, hence:

x + y = 50.

There are 160 legs in total. Considering that each cow has four legs, while each chicken has two legs, we have that:

4x + 2y = 160.

The system of equations is composed by these two equations and can be solved using any method to identify the amounts of each animal.

More can be learned about a system of equations at https://brainly.com/question/24342899

#SPJ1

Answer:

4091

Step-by-step explanation:

Given the equation;

3x + 7x − 28 + 31 − 8x

First, we would collect like terms;

3x + 7x − 8x − 28 + 31

Simplifying, we have;

For x = 2043;

2(2043) + 5 = 4086 + 5 = 4091.

Answer:

-2

Step-by-step explanation:

x² + 6x = 40

This equation has the value of x as 4

Let's test

(4)^2 + 6(4) = 40

16 + 24 = 40

So, x is 4 in this equation

Now for the question, what is the value of x-6

We know x is 4

4 - 6 = -2

Yes, they are solvable.

In geometry, a triangle is considered to be an "AAA" triangle (or "AAA similarity") if all three of its angles are equal. Such a triangle is also known as an equilateral triangle.

An equilateral triangle is a type of triangle that has all three sides of equal length and all three angles of equal measure (60 degrees). It is a regular polygon, and it is one of the few geometric shapes that has this property.

Because all three angles in an equilateral triangle are equal, it is relatively easy to solve for various properties of the triangle. For example, the length of each side can be found if the measure of one angle and the length of one side are known. Similarly, the measure of an angle can be found if the length of one side and the measure of one angle are known.

In summary, AAA triangles are solvable because they have a consistent and predictable structure, with all sides and angles being equal.

To learn more about AAA triangles, check out https://brainly.com/question/29887944

The median for the next batch of observations is 8.

The median is the value in the middle of a data set, which indicates that 50% of the data points have a value less than or equal to the median, and 50% have a value greater than or equal to the median. The median is the number in the middle of a set of numbers. The median represents the 50th percentile of the set of numbers. In other words, the median is the value in the center of a set of numbers where half are less than the median and half are more than the median.

Here,

given set of observation,

= 5,5,5,8,8,9,11

n=7

median=(7+1)/2

=4th term

=8

The median for following set of observation is 8.

To know more about median,

brainly.com/question/29156884

#SPJ4