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Zinaida [17]
2 years ago
10

Lucy is knitting a blanket and needs to buy some more yarn. at her local craft store, 2 skeins of yarn cost $7 and 8 skeins of y

arn cost $28. what is the constant of proportionality in this direct variation?
Mathematics
1 answer:
laila [671]2 years ago
7 0

Answer:

4

Step-by-step explanation:

Proportionality between skein values

8:2=4:1

Proportionality between cost values

28:7=4:1

The variation(both the skein values and cost values) has the constant of 4 ie the 1st skein value × 4= the last skein value & the 1st cost value × 4=the last cost value

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Zarrin [17]

Answer:

la respuesta esta abajo

Step-by-step explanation:

a) Sea x el número del artículo x mientras que y representa el número del artículo y.

Dado que cada cantidad de artículo x requiere 2 horas de trabajo de perforación, mientras que cada cantidad de artículo y requiere 5 horas de trabajo de perforación. Hay un máximo de 40 horas disponibles, por tanto el modelo se da como:

2x + 5y ≤ 40

b) La trama se trazó utilizando la herramienta gráfica en línea de geogebra.

c) Para 10 unidades de X y 5 unidades de y:

2 (10) + 5 (5) = 45> 40

Por lo tanto, esto no sería posible porque requerirá 45 horas de perforación, lo que es más que el máximo de 40 horas disponibles.

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3 years ago
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You know that you want some type of wood flooring. You found these options at the store.
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Answer:

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It will cost $73 perhour to rent a sailboat and $88 to rent a ski boat.how much more will it cost to rent a ski boat than a sail
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Well we want to find out how much more will it cost to rent a ski boat than a sailboat for four hours. 

All we have to do is Multiply 73 by 4 for the sailboat which gives you $292 

Now we do the same for the ski boat. $88 * 4 = $352 

So we now have to find out how much more it will cost for a ski boat than a sail boat. All we do is subtract 352 by 292 

352
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