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liq [111]
3 years ago
9

Every hour is 65 miles so how long does it take the car to travel 26 miles at this speed?

Mathematics
1 answer:
mr_godi [17]3 years ago
4 0

Answer:

.4 hours or 24 minutes

Step-by-step explanation:

We can use proprtions to solve this problem.  Put distance over time

65 miles      26 miles

------------- = -----------

1 hour          x hours

Using cross products

65x = 26

Divide by 65

65x/65 = 26/65

x = .4 hours

or we can change to minutes

.4 hours * 60 minutes/ 1 hour = 24 minutes

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Simplify the sum. State any restrictions on the variables. (x-2)/(x+3) + (10x)/(x^(2)-9)
nlexa [21]
\frac{x-2}{x+3} + \frac{10x}{ x^{2} -9}= \\ = \frac{x-2}{x+3}+ \frac{10x}{(x-3)(x+3)}=
Restrictions are: x ≠ - 3,  x ≠ 3.
= \frac{(x+2)(x-3)+10x}{(x+3)(x-3)}= \\  \frac{ x^{2} -3x+2x-6+10x}{(x+3)(x-3)}= \\ = \frac{ x^{2} +9x-6}{(x+3)(x-3)}
6 0
3 years ago
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1. Los hoteles están clasificados por estrellas de 1 a 5 de acuerdo con la ubicación, atención servicios y lujos que proporcione
igor_vitrenko [27]

Answer:

El orden de menor a mayor es:

1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4

La mediana es 3.

Step-by-step explanation:

En la ciudad se hizo la relación de hoteles según la lista de estrellas, la cual se ordena de menor a mayor. Entonces, el orden determinado es:

1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4

La mediana de un conjunto de números es el número medio en el conjunto, una vez que los números han sido ordenados de menor al mayor, o, si hay un número par de datos, la mediana es el promedio de los dos números medios.

En este caso el conjunto posee 38 datos. Cuando el número de observaciones es par es posible calcular la mediana como:

Mediana=\frac{n+1}{2} donde n es la cantidad de observaciones.

Entonces:

Mediana=\frac{38+1}{2}

Mediana= 19.5

Esto indica que el valor de la mediana se encuentra en la observación cuya posición esta entre la 19 y la 20.  Entonces el valor de la mediana será una media de los valores que están en la posición 19y 20. Estos números son 3 y 3. La media entre estos dos números es:

\frac{3+3}{2} =3

<u><em>La mediana es 3.</em></u>

5 0
3 years ago
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How many ways can you put the letters in "Utah" in order?
vodomira [7]
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5 0
3 years ago
The velocity of a particle moving back and forth on a line is vequalsStartFraction ds Over dt EndFraction equals6 sine (2 t )Sta
max2010maxim [7]

Answer:

s = 6 m

Step-by-step explanation:

The value of the velocity v is given as:

v = \frac{ds}{dt} = 6 sin(2t) m/s

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When t = π/2, s will be:

s = -3cos(2 * π/2) + 3

s = -3cos(π) + 3

s = -3(-1) + 3

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3 years ago
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I need a question or a problem to solve??
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