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Rus_ich [418]
3 years ago
14

(2x+7x2+x)+(2x-4x-12)

Mathematics
1 answer:
expeople1 [14]3 years ago
3 0

Answer:

Step-by-step explanation:

Solución paso-a-paso

Más icono

Reformateo de la entrada:

Los cambios realizados en su entrada no deberían afectar la solución:

(1): "x2"   fue reemplazado por   "x^2".  1 reemplazo (s) más similar (es).

PASO

1

:

Ecuación al final del paso 1

 (((2 • (x3)) +  7x2) -  7x) -  12

PASO  

2

:

Ecuación al final del paso

2

:

 ((2x3 +  7x2) -  7x) -  12

PASO

3

:

Buscando un cubo perfecto

3.1    2x3+7x2-7x-12  no es un cubo perfecto

Tratando de factorizar sacando:

3.2      Factorización:  2x3+7x2-7x-12  

Divida cuidadosamente la expresión en grupos, cada grupo tiene dos términos:

Grupo 1: -7x-12  

Grupo 2:  7x2+2x3  

Retirar de cada grupo por separado:

Grupo 1:  (7x+12) • (-1)

Grupo 2:   (2x+7) • (x2)

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1. Analiza cada problema y realiza su diagrama.
Maru [420]

Invitamos cordialmente a leer el desarrollo del problema para mayor detalle sobre el análisis de la situación y la construcción del diagrama.

<h3>Cómo construir un diagrama a partir de un enunciado</h3>

En esta pregunta debemos elaborar un diagrama de flujo, puesto que el enunciado muestra de manera evidente una clasificación de los viajeros según las ciudades de destino.

Nótese que se trata de un diagrama bastante simple, dado que no existe evidencia de jerarquización entre las ciudades mencionadas.

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Para aprender más sobre diagramas, invitamos cordialmente a ver esta pregunta verificada: brainly.com/question/10092453

7 0
2 years ago
Find the area of the circle.<br> Use 3.14 for it.<br> (<br> d = 8 cm<br> A = [?] cm2<br> A=Tr2
storchak [24]
What the make no sense but I believe it is 50.24 hope that helps
8 0
3 years ago
How do u solve y=3x 5x+2y=44
Digiron [165]

Answer:  which will give you 15x+3y=44 and you cannot do anything else because you don't have any like terms any more so that's your answer.

Step-by-step explanation: the first thing you need to do first is to combine like terms. and if i did a mistake sorry but i hope this helps.

4 0
3 years ago
A person 6ft tall stands 10ft from point P directly beneath a lantern hanging 30 ft above the ground. The lantern start to fall,
xxMikexx [17]

Answer:

\frac{dL}{dt}=30 \frac{ft}{s}

Step-by-step explanation:

In order to solve this it is always a good idea to start by drawing a diagram of the situation (See attached picture).

From the diagram we can see that we are dealing with similar triangles. We can use similar triangles to build an equation that relates the length of the shadow with the height of the lamp, so we get:

\frac{L}{6}=\frac{10+L}{h}

the height of the lamp can be found by subtracting the 16t^{2} distance the lamp falls in a given time t from the original 30ft the lamp was located at.

So the equation will now lok like this:

\frac{L}{6}=\frac{10+L}{30-16t^{2}}

So now we can solve the equation for L, we can start by multiplying by the LCD SO WE GET:

L(30-16t^{2})=6(10+L)

next, we can distribute the right side of the equation so we get:

L(30-16t^{2})=60+6L

and subtract 6L from both sides so we get:

L(30-16t^{2})-6L=60

and factor L, so we get:

L(30-16t^{2}-6)=60

and solve for L:

L=\frac{60}{24-16t^{2}}

now, we can differentiate this equation by using the chain rule, so we get:

dL=-\frac{60}{(24-16t^{2})^{2}}(-32t)dt

which can be simplified to:

\frac{dL}{dt}=\frac{1920t}{(24-16t^{2})^{2}}

and now we can substitute t for 1s so we get:

\frac{dL}{dt}=\frac{1920(1)}{(24-16(1)^{2})^{2}}

\frac{dL}{dt}=30 \frac{ft}{s}

7 0
3 years ago
A professor would like to test the hypothesis that the average number of minutes that a student needs to complete a statistics e
Elodia [21]

Answer:

The critical value for this hypothesis test is 6.571.

Step-by-step explanation:

In this case the professor wants to determine whether the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes.

Then the variance will be, \sigma^{2}=(5.0)^{2}=25

The hypothesis to determine whether the population variance is less than 25.0 minutes or not, is:

<em>H</em>₀: The population variance is not less than 25.0 minutes, i.e. <em>σ²</em> = 25.

<em>Hₐ</em>: The population variance is less than 25.0 minutes, i.e. <em>σ²</em> < 25.

The test statistics is:

\chi ^{2}_{cal.}=\frac{ns^{2}}{\sigma^{2}}

The decision rule is:

If the calculated value of the test statistic is less than the critical value, \chi^{2}_{n-1} then the null hypothesis will be rejected.

Compute the critical value as follows:

\chi^{2}_{(1-\alpha), (n-1)}=\chi^{2}_{(1-0.05),(15-1)}=\chi^{2}_{0.95, 14}=6.571

*Use a chi-square table.

Thus, the critical value for this hypothesis test is 6.571.

7 0
4 years ago
Read 2 more answers
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