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Lubov Fominskaja [6]
3 years ago
13

A secretary can type 56 words per minute. how much time will she need to type a 4200-word report?

Mathematics
1 answer:
tino4ka555 [31]3 years ago
7 0
The answer would be D, because you do 4200÷56=75 minutes. 75 minutes= 1 hour and 15 minutes
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Mia and her family went to dinner, and the bill, including tax, came to $54.65. Mia suggested giving the server a gratuity of about 20 percent of the bill.

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✔ $11

If they give a gratuity of 20 percent, rounded to the nearest dollar, what is the total cost of the dinner, including the tip?

✔ $65.65

Step-by-step explanation:

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What type of base must a cylinder have?<br> triangular<br> circular<br> square<br> quadrilateral
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El costo de producir 10 juegos de video al día es de 350 dólares , mientras que producir 30 juegos del mismo tipo al día cuestan
Dovator [93]

Answer:

El coste de producir un juego de vídeo es de 125 dólares.

Step-by-step explanation:

(This exercise is written in Spanish and is incomplete. Complete statement will be presented below)

El costo de producir 10 juegos de video al día es de 350 dólares , mientras que producir 30 juegos del mismo tipo al día cuestan 850 dólares . Si suponemos un modelo lineal como el descrito anteriormente , determine:

¿Cuál es el costo de producir un juego de vídeo?

(Explanation will be held in Spanish)

El modelo lineal es un polinomio de primer orden de la forma:

y = a\cdot x + b

Donde:

x - Variable independiente (eje x - Cantidad de juegos de vídeo producidos - Adimensional)

y - Variable dependiente (eje y - Coste de producción de juegos de vídeo - Dólares)

a - Pendiente de la función.

b - Intercepto en el eje y.

Dados los dos costes para dos cuotas distintas de producción, se construye el siguiente sistema de ecuaciones lineales:

10\cdot a + b = 350

30 \cdot a + b = 850

Se resuelve el sistema con algo de manipulación algebraica:

(30\cdot a + b) - (10\cdot a + b) = 850 - 350

20 \cdot a = 500

a = 25

Luego:

b = 850 - 30\cdot a

b = 100

La ecuación lineal es:

y = 25\cdot x +100

Finalmente, el coste de producir un juego de vídeo es:

y = 25 \cdot (1) + 100

y = 125

El coste de producir un juego de vídeo es de 125 dólares.

7 0
4 years ago
Which shows all the exact solutions of sin^2 x + 3cos x - 1 = 2?
Zarrin [17]

Answer:

x = 2k\pi is the solution of this equation.

Step-by-step explanation:

This question is related to trigonometric equations.

The given equation is,

sin^{2} x + 3cos x - 1 = 2

We have to find the solutions of this equation.

Put sin^{2}x  = 1 - cos^{2}x

1 - cos^{2}x + 3cosx - 1 = 2

cos^{2}x -3cosx+2 = 0

For this equation only cosx = 1 is possible solution.

Cosx = 1 happens when x is a multiple of 2\pi

So x = 2k\pi is the solution of this equation.

3 0
3 years ago
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