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solniwko [45]
2 years ago
6

A textbook store sold a combined total of 478 biology and history textbooks in a week. The number of biology textbooks sold was

48 more than the number of number of history textbooks sold. how many textbooks of each type were sold
Mathematics
1 answer:
skelet666 [1.2K]2 years ago
6 0

Answer:

215 history and 263 biology

Step-by-step explanation:

478 - 48 = 430. 430/2 = 215. 215 history textbooks. 215 + 48 = 263 biology textbooks

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KatRina [158]

Answer:500(1.2)^x

Plato :)

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2 years ago
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Problema de capacidades Una empresa aceitera ha envasado 3000 litros de aceite en 1200 botellas de dos y de cinco litros. ¿Cuánt
mariarad [96]

Answer:

Hay 200 botellas de 5 litros y 1000 botellas de 2 litros.

Step-by-step explanation:

Un sistema de ecuaciones lineales es un conjunto de dos o más ecuaciones de primer grado, en el cual se relacionan dos o más incógnitas.

Resolver un sistema de ecuaciones consiste en encontrar el valor de cada incógnita para que se cumplan todas las ecuaciones del sistema.

En este caso, las variables a calcular son:

  • x= cantidad de botellas de 2 litros.
  • y= cantidad de botellas de 5 litros.

Una empresa aceitera ha envasado 3000 litros de aceite en 1200 botellas de dos y de cinco litros. Entonces es posible plantear el siguiente sistema de ecuaciones:

\left \{ {{2*x+5*y=3000} \atop {x+y=1200}} \right.

Existen varios métodos para resolver un sistema de ecuaciones. Resolviendo por el método de sustitución, que consiste en despejar o aislar una de las incógnitas y sustituir su expresión en la otra ecuación, despejas x de la segunda ecuación:

x= 1200 - y

Sustituyendo la expresión en la primer ecuación:

2*(1200 - y) + 5*y=3000

Resolviendo se obtiene:

2*1200 - 2*y + 5*y= 3000

2400 +3*y= 3000

3*y= 3000 - 2400

3*y= 600

y= 600÷3

y= 200

Reemplazando en la expresión x= 1200 - y:

x= 1200 - y

x=1200 -200

x= 1000

<u><em>Hay 200 botellas de 5 litros y 1000 botellas de 2 litros.</em></u>

7 0
3 years ago
What is the slope of the line that passes through the points(7,-9) and (15,-29)?
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(Y-Y1)/(X-X1)
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3 0
3 years ago
Describe how to draw a line that passes through the origin and has a slope of -2/-3?
Sophie [7]
First of all you know it wiill be a positive slope as both the rise and the run are negative. a negative divided by a negative equals a positive. so you can plot the points (2,3) and (-2,-3) as they will be points on this line. next you take a straight line and place it so that both points are intercepted. then extend the line outwards.
7 0
3 years ago
Rewrite the following mixed number as a decimal. <br><br> 8 1/100
Lemur [1.5K]

Answer:

8.01

Step-by-step explanation:

8\frac{1}{100} is the same as \frac{801}{100}

Divide:

801 ÷ 100 = 8.01

7 0
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