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Answer:Un sistema de ecuaciones es un conjunto de ecuaciones con las mismas incógnitas. Un

sistema de ecuaciones lineales es un sistema de ecuaciones en el que cada ecuación es lineal. Una solución de un sistema es una asignación de valores para las incógnitas que hace

verdadera cada una de las ecuaciones. Resolver un sistema signifi ca hallar todas las soluciones del sistema.

Veamos a continuación un ejemplo de un sistema de ecuaciones lineales con dos incógnitas:

Ecuación 1

Ecuación 2 b

2x y 5

x 4y 7

Podemos comprobar que x  3 y y  1 es una solución de este sistema.

Ecuación 1 Ecuación 2

2132 1 5 3 4112 7

2x y 5 x 4y 7

Step-by-step explanation:

Answer:

Translated to english from person who answered before

Step-by-step explanation:

A system of equations is a set of equations with the same unknowns. A

Linear equation system is a system of equations in which each equation is linear. A solution of a system is a mapping of values for unknowns that makes

true each of the equations. Solving a system means finding all the solutions in the system.

Here's an example of a system of linear equations with two unknowns:

Equation 1

Equation 2 b

2x and 5

x 4 and 7

We can check that x 3 and y 1 is a solution of this system.

Equation 1 Equation 2

2132 1 5 3 4112 7

2x and 5 x 4y 7

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It would be B, C and D

All of them simplify to 2 : 5

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Answer:

B, C, D

Step-by-step explanation:

So just simplify the ratio first:

Divide by 2 | 4 : 10

Divide by 2 | 2 : 5

Multiply the ratio next:

Multiply by 3 | 24 : 60

Answer:

Step-by-step explanation:

Answer:

They are supplementary angles.

Step-by-step explanation:

161+ 19 = 180

When two angles add to 180 degrees, they  are supplementary angles

Answer:

Supplementary Angles

Step-by-step explanation:

They add to 180 degrees

Answer:

scalene

Step-by-step explanation:

all sides have different measurements

Answer:

x=33

Step-by-step explanation:

because DC and AB are the same, x must be 33.

Answer:

They claim that 90% of the times, the orders arrive in time.

Then, out of N orders, (90%/100%)*N of them will arrive in time.

Here we have that N = 20

then the number that arrives in time is:

(90%/100%)*20 = 18

Now, experimetally we see that 4 times her packages arrived after noon (so 16 times the packages arrived in time), so we can calculate the experimental percentage as:

(X/100%)*20 = 16

X = (16/20)*100% = 80%

so the percentages doesn't match, so it the claim is not really accurate, but this is a small sample, so if the number of times that she uses the delivery increases, we may see that the experimental percentage gets closer to the claimed percentage.

Answer:

d

Step-by-step explanation:

Negative 4 (Negative two-fifths + 3 x) is StartFraction 8 over 5 EndFraction minus 12 x, option D is correct.

Two or more expressions with an Equal sign is called as Equation.

The given equation is Negative 4 (Negative two-fifths + 3 x).

-4(-2/5+3x)

We solve the equation by using distributive property.

Now apply distributive property

-4(-2/5)-4(3x)

8/5-12x

StartFraction 8 over 5 EndFraction minus 12 x

Hence, Negative 4 (Negative two-fifths + 3 x) is StartFraction 8 over 5 EndFraction minus 12 x, option D is correct.

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Answer:

it is b

Step-by-step explanation:

Answer:

the answer is b and im doing this to show u people that there has to be only 2 answers to a quetion to give brainliest

Step-by-step explanation:

Answer:

The second one; x²+7x+12

Step-by-step explanation:

So, since the beginning lengths of the square is x and x, the area of the square is x².

But then, you add 3 to one length, so that side is now (x+3), and then you add 4 to the width, so that is now (x+4).

Finally, you would multiply them together to get the equation you would use to find the new area.

For this, you would cross-multiply everything together; the x in the length by the x in the width, the x in the length by the 4 in the width, the 3 in the length by the x in the width, and then the 3 in the length by the 4 in the width. Now, all you have to do is add all of these together to get your answer.

Here's the work:

[tex](x+3)(x+4)\\x^{2}+3x+4x+12\\x^{2}+7x+12[/tex]

Answer: 47

Step-by-step explanation:

first no. : 5× 8=40

second no. : 7

sum=40+7=47

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Answer:

Mass of each can = 680 grams

Step-by-step explanation:

Mass of a canvas shopping bag  = 600 grams Or [tex]\frac{600}{1000}[/tex] Kilograms

                                                      = 0.6 Kilograms

Let the mass of each can = w Kilograms

Then the mass of 5 cans = 5w Kilograms

Total mass of the bag when these cans were kept in the bag = 4 Kilograms

(5w + 0.6) = 4

5w + 0.6 - 0.6 = 4 - 0.6

5w = 3.4

w = [tex]\frac{3.4}{5}[/tex]

   = 0.68 Kilograms

   = [tex]0.68\times 1000[/tex]

   = 680 grams

Therefore, mass of each can = 680 grams

Answer:

680

Step-by-step explanation:

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Answer:

12

Step-by-step explanation:

5(x+3) = 3(2x-1)

5x+15 = 6x-3

15-3 = 6x-5x

12 = x

x = 12

The number should be 12.

Given that,

Based on the above information, the following equation should be made:

5(x+3) = 3(2x-1)

5x+15 = 6x-3

15-3 = 6x-5x

12 = x

x = 12

Therefore we can conclude that the number is 12.

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Answer:

All units for volume are units cubed. units^3

Answer:81

Step-by-step explanation:

9•9 = 81

Answer:

35 inches

Step-by-step explanation:

Regular, means that all the sides of the pentagon are the same, so you can multiply 21 * 5/3 = 35

Answer:400 yards

Step-by-step explanation:Let L represents the position of library, R represents the restaurant and M represents the museum,

Since, By the given diagram,

∠MLR = 90°,

LR = 300 yd,

RM = 500 yd,

So, by the Pythagoras theorem,

By substituting the values,

Hence, the distance between library and museum is 400 yards.

Answer: Normal distribution or Gaussian distribution.

Step-by-step explanation:

Normal distribution, this means that we will see something that remaind us to a Gaussian Bell (a curved shape that goes to zero in the extremes and has a maximum in the middle)

If we have some biased points in one side, suppose left, we will have a skewed distribution, that has some important differences with the normal distribution at the time of describe it mathematically.

Answer:

Let's check one by one:

y + 11 > -9

-25 + 11 > -9

-14 > -9 (wrong)

y - 17 <= -46

-25 - 17 <= -46

-42 <= -46 (wrong)

30 <= y + 5

30 <= -25 + 5

30 <= -20 (wrong)

y + 20 > -30

-25 + 20 > -30

-5 > -30 (Right)

=> Last option is solution

Hope this helps!

:)

The required inequality that contains -25 in its solution is y +20 > -30.
Option D is correct.

Number of inequality is given y + 11 > -9 , y - 17≤  -46, 30 ≤ y + 5, y + 20 > -30, the inequality that contains -25 to its solution of set to be determine.

Inequality can be defined as the relation of an equation containing the symbol of ( ≤, ≥, <, >) instead of the equal sign in an equation.

1)  y + 11 > -9
    y >-20
It does not contain -25. in its solution set.

2)  y - 17≤  -46
     y  ≤ -29

It does not contain -25. in its solution set.

3) 30 ≤ y + 5
   25 ≤ y
It does not contain -25. in its solution set.

4) y + 20 > -30
    y  > -50
It does contain -25 in its solution.

Thus, the required inequality that contains -25 in its solution is y +20 > -30.

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Answer:

[tex]3 \frac{3}{ 19} [/tex]

Answer:

Mean (Average): 133

Step-by-step explanation:

Answer:

the answers are

option

A

B

E

Step-by-step explanation:

A. as when we do 40+5=45, so 6 x 45

B. as 4+2=6,so 6 x 45

E.as 20+25=45,so 6 x 45

im sorry but i cant see the orange cuboid number at the bottom but i'll consider its a 5cm (i hope its correct)

firstly, you have to find the area of EACH faces then just add them togeher

whereas, diagram A

9 x 9 = 81 ( 1 face)

* since cube has 6 faces then just multiply by 6 then

answer: 486 cm²

for diagram B

front and back faces: 2(5x7)

left and right faces: 2(15x7)

top and bottom: 2(5x15)

answer: 430cm²

then compare between 486 and 430

answer should be 486 > 430

hope this helps :)

Answer:

5 cm

Step-by-step explanation:

Answer:

X = -(146/123) , Y = 21/41

Step-by-step explanation:

2-12x-4y = 32-8y-39x

39x-12x+8y-4y = 32-2

27x+4y = 30

27x+4y-30 = 0

32-8y-39x = 6y-6x

32-8y-6y-39x+6x = 0

-33x-14y+32 = 0

Answer:

see below

Step-by-step explanation:

To change from a decimal to a fraction  count the number of decimals and add that many zeros after the 1 in the denominator, then simplify

To change a decimal to a percent, move the decimal to places to the right and add a percent sign

To change a fraction to a decimal divide the numerator by the denominator

To change a percent to a decimal move the decimal 2 places to the left and remove the percent sign( if there are fractions, change to a decimal)

113/1000 =                            .113                                    = 11.3 %

2275/1000 =91/400              .2275                           22 3/4%

1/200                                       .005                                  .5%

3 85/100                                   3.85                                  385%

Answer:

hope this works

Step-by-step explanation:

A1-x= 5

A2-x= 9

A3-x= 4

A4-x= -5

B1-x= 11

B2-x= 21

B3-x= 2

B4-x= -8

C1-x= 6

C2-x= 7

C3-x= 22/3 or 7.33

C4-x= 4.5

D1-x= 14

D2-x= 30

D3-x= 24

D4-x= 108

1) r= 10

2) n= -4

3) p= -9

4) r= 6

5) k= -4

6) n= 15

Answer: 39

Step-by-step explanation:

Total number of orange trees = 1521

Note :

There are as many trees in a row as there are rows in the garden.

Therefore :

Number of rows in the garden = number of trees in a row

Let the number of rows in the garden = y

Hence, the number of trees in a row also = y

Total number of trees in the garden = number of trees in a row × number of rows in the garden

Total number of trees in the garden = y × y

1521 = y × y ; 1521 = y^2

y = √1521

y = 39

Answer:

Step-by-step explanation:

Total number of orange trees = 1521

Note :

There are as many trees in a row as there are rows in the garden.

Therefore :

Number of rows in the garden = number of trees in a row

Let the no.f trees in each row =x

let the no.f rows=x

therefore total no.f trees =x raised to 2

x raised to 2 =1521

therefore x=39

there fore no.of rows =39

Answer:One pint and 16 quarts or one pint and four gallons

Step-by-step explanation:there are two pints in a quart and there are 4 quarts in a gallon.

Answer:

Find the value of x the value is x=4

3x4=12

12-5=7

Step-by-step explanation:

The solution of the equation is [tex]x=4[/tex]

The given equation is,[tex]3x-5=7[/tex]

To solve above equation, isolate variable x on one side and constant numbers on other side of equation.

[tex]3x-5=7\\\\3x=7+5\\\\3x=12\\\\x=12/3\\\\x=4[/tex]

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