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Levart [38]
3 years ago
11

Solve the equation (3x+10)+81=0​

Mathematics
2 answers:
True [87]3 years ago
3 0
The answer is x=-91/3

Step by step:
3x+91=0

3x=-91

x=-91/3
Anni [7]3 years ago
3 0

Answer:

x = -30*1/3

Step-by-step explanation:

(3x+10)+81=0

3x + 10 + 81 = 0

3x + 91 = 0

3x = -91

x = -91/3

x = -30*1/3

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Harper simplemente encendió una vela nueva y luego la dejó arder hasta la nada. La longitud de la vela que permanece sin quemar,
Fudgin [204]

Answer:

La pendiente de la ecuación es -1.5 y su interpretación en el contexto del problema es que en este caso este valor indica que la longitud L de la vela luego de t horas desde que se encendió la decrece en 1.5 unidades por cada hora.

Step-by-step explanation:

La función lineal se define por la ecuación

f(x) = mx + b

o

y = mx + b

donde m es la pendiente de la recta y b es la ordenada al origen.

La gráfica de una función lineal es siempre una recta.

Como se mencionó, la m es la pendiente de la recta. La pendiente es la inclinación con respecto al eje x, que es el eje de abscisas.

La pendiente m significa que si aumentamos la x en una unidad, la y aumenta en m unidades. Si m es positiva (m > 0), entonces la función es creciente. En cambio, si la m es negativa (m < 0), entonces la función es decreciente.

En este caso, siendo L=1.5 - 1.5t y comparando con la expresión y=mx + b, podes observar que el valor de la pendiente m es -1.5. Como m es un número negativo, entonces se trata de una función decreciente. En este caso este valor de pendiente indica entonces que la longitud L de la vela luego de t horas desde que se encendió la decrece en 1.5 unidades por cada hora.

<u><em>La pendiente de la ecuación es -1.5 y su interpretación en el contexto del problema es que en este caso este valor indica que la longitud L de la vela luego de t horas desde que se encendió la decrece en 1.5 unidades por cada hora.</em></u>

4 0
3 years ago
Help Please!<br> Find the value of x for which ABCD must be a parallelogram.
Pepsi [2]

Answer:

2

Step-by-step explanation:

We know that the opposite sides of a parallelogram are equal so:

25x+1=7x+37

18x=36

x=2

4 0
3 years ago
The focus of a parabola is (4,7) and the directrix is y=8.
disa [49]
We know that the x-ordinate of the vertex is x = 4, because the x-ordinate of the vertex will not change.

Now, the definition of a parabola in locus terms is that for any fixed point that lies on the parabolic shape, it is equidistant from the directrix to the fixed point and the focus to the fixed point.

Thus, we can deduce that:
PS = PD, where P(x, y) is a moving point that lies on the parabola.

Now, we know that the latus rectum will be -4a, because the directrix is higher than the y-ordinate of the focus. Thus, we can say that the vertex will be the midpoint of the two points y = 7 and y = 8, because that is the only place where the definition of a parabola works.

Hence, we can say that the vertex lies at (4, 7.5).

Thus, our general form becomes:
(x - 4)² = 4a(y - 7.5)

To find a, we can say: 7 = 7.5 + a and 8 = 7.5 - a
a = -0.5, because a is the factor in which we move to find the directrix and focus.

Thus, our equation becomes: (x - 4)² = -2(y - 7.5)
3 0
3 years ago
Angles R and S are supplementary angles. which is the measure of R?
ycow [4]

Answer:

<h2>R = 15°</h2>

Step-by-step explanation:

Since angles R and S are supplementary angles it means that the sum of their angles add up to 180°

To find R we must first find x

To find x , add angles R and S and equate them to 180

That's

R + S = 180

80 - x + 3x - 30 = 180

2x + 50 = 180

2x = 180 - 50

2x = 130

Divide both sides by 2

x = 65°

From the question

R = 80 - x

But x = 65°

Substitute the value of x into the expression

That's

R = 80 - 65

We have the final answer as

<h3>R = 15° </h3>

Hope this helps you

6 0
3 years ago
a ceiling fan is rotating at 0.96 rev/sec. when turned off, it slows uniformly to a stop in 2.4 min. How many revolutions does t
Mrrafil [7]
When the decrease in velocity (the acceleration) is uniform, the average velocity is [Initial velocity - Final velocity]/2

We know tha the initial velocity is 0.96 rev / sec and the final velocity is 0,

Then, the average velocity is  [0.96 / 2 ]rev /sec = 0.48 rev/sec.

Also, by defintion,

average velocity = number of  rev / time,

From which, number of rev = average velocity *  time

So, number of rev = 0.48 rev/sec * 2.4 min * 60sec /min = 69.12 rev

Answer: 69.12 revolutions
3 0
3 years ago
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