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solniwko [45]
3 years ago
5

Write an equivalent expression for 3(x+4) + 2(x-2) that has only two terms. also if u answer this i will also friend u :3 thx

Mathematics
1 answer:
Rudik [331]3 years ago
3 0

Answer:5x+8

Step-by-step explanation:

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15points+brainliest!! please help this is due tonight please need it asap!!
Agata [3.3K]

Answer:

1) B   15.81

2) D  (-12,0)

8 0
3 years ago
What is the solution for -3x ≥ 36? x ≤ -12 x ≥ -12 x ≤ -108 x ≥ -108
konstantin123 [22]

Answer:

Step-by-step explanation:

Let  

V

be the number of vertices of a polyhedron,  

F

the number of faces of that polyhedron, and  

E

be the number of edges. The quantity  

χ

=

V

−

E

+

F

is called the Euler characteristic (of a polyhedron). In the case of convex polyhedra,  

χ

=

2

.

Consider, for example, a tetrahedron (which is the simplest solid). It has 4 faces,  

1

2

(

4

)

(

3

)

=

6

edges, and  

1

3

(

4

)

(

3

)

=

4

vertices. Thus we have  

V

−

E

+

F

=

4

−

6

+

4

=

2

.

Euler's formula holds for all Platonic solids (tetrahedron, cube, octahedron, dodecahedron, and icosahedron). Since a cube and an octahedron are dual polyhedra (each is formed by connecting the centers of the faces of the other), their  

V

and  

F

values are equal to the  

F

an  

V

values of the other. (The same is true for the dodecahedron and icosahedron).

3 0
3 years ago
Read 2 more answers
Hola me ayudan con esta pregunta TRANSFORMAR LOS SIGUIENTES DECIMALES EN FRACCIÓN, 1.- 8,485 2.- 125,65 3.- 54,987987... 4.- 266
Nitella [24]

Answer:

Ve la respuesta abajo

Step-by-step explanation:

Para hacer la conversión de decimales a fracción, es necesario hacer dos cosas:

1. Identificar el tipo de decimal (finitos, infinito periódico, infinito semi periódico).

2. Aplicar la expresión o formula correspondiente, dependiendo del tipo de decimal.

Un decimal finito es aquel que solo tiene un número determinado de decimales y no se extiende al infinito.

Un decimal infinito periódico, es aquel cuya cifra decimal se repite constantemente hasta el infinito, esto puede ser un decimal, dos, etc.

Un decimal semi infinito periódico es aquel donde una parte de los decimales se mantiene sin repetir, y la otra parte se repite hasta el infinito.

Una vez que hayas identificado el tipo de decimal, solo debes aplicar alguna de los 3 casos siguientes:

1. PAra un decimal finito se convierte la cifra decimal en un numero entero multiplicando por 10, 100, 1000 depende del número de decimales que tenga, y se divide entre 10, 100, 1000.... segun el número de decimales y se simplifica la fracción si es posible.

2. Para un infinito periódico se anota el número y se le resta él o los números que están antes del período. Se coloca como denominador un 9 por cada número que está en el período (si hay un número bajo la rayita se coloca un 9, si hay dos números bajo el período se coloca 99, etc.). Si se puede simplificar, se simplifica.

3. El numerador de la fracción se obtiene, restando al número la parte entera y el anteperíodo, o sea, todo lo que está antes de la “rayita”.  El denominador de la fracción se obtiene colocando tantos 9 como cifras tenga el período y tantos 0 como cifras tenga el anteperíodo. Como siempre, el resultado se expresa como fracción irreductible (no se puede simplificar más) o como número mixto.

Dicho esta parte teórica, pasemos a la práctica y convirtamos los decimales a fracción:

1. 8,485: decimal finito, con 3 decimales, lo anotamos sin la coma, y entonces colocas como denominador el 1000, porque fueron 3 decimales, 3 ceros ----------> 8485/1000 = 1697/200   (se simplificó por 5)

2.  125,65: decimal finito -----> 12565/100 = 2513/20

3. 54,987987: infinito periódico, aplicamos los pasos de arriba:

54,987987 = 54987 - 54 / 999 = 54933 / 999

4. 266.8484..: infinito periódico

266,8484.... = 26684 - 266 / 99 = 26418 / 99

5. 4,78999.: Infinito semiperiódico

4,78999 = 4789 - 478 / 900 = 4311 / 900

6. 942,74111: infinito semiperiódico

942,74111 = 942741 - 94274 / 900 = 848467 / 900

Espero te sirva

3 0
3 years ago
In 1985, the average ACT score was 18 with a standard deviation of 6. Also in 1985, the average SAT score was
lord [1]

The ACT score was better since the z-score of the ACT is greater than the z-score of the SAT. Then the correct option is B.

<h3>What is a normal distribution?</h3>

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 z-score is given as

\rm z = \dfrac{x - \mu }{\sigma}

In 1985, the average ACT score was 18 with a standard deviation of 6.

Also in 1985, the average SAT score was 500 with a standard deviation of 100.

Dr. Robertson took both tests in 1985 and scored a 26 on the ACT and a 620 on the SAT.

Then the z-score of the ACT will be

\rm z = \dfrac{26 - 18}{6}\\\\z = 1.3333

Then the z-score of the SAT will be

\rm z = \dfrac{620 - 500}{100}\\\\z = 1.2

Then the ACT score was better since the z-score of the ACT is greater than the z-score of the SAT.

More about the normal distribution link is given below.

brainly.com/question/12421652

#SPJ1

6 0
2 years ago
How do i solve for x 30x - 60 = 20x
Lena [83]
First, subtract 30x from each side to get:
-60 = -10x
Then, divide each side by -10 to get:
x = 6
Now, plug back in to check your answer:
30(6) - 60 = 20(6)
180 - 60 = 120
120 = 120

Hope this helps!! :)
4 0
3 years ago
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