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guajiro [1.7K]
2 years ago
9

Rectangle area w algebra step by step explanation please :)

Mathematics
1 answer:
Natalija [7]2 years ago
8 0

We know that the area is 20.

Since 20 is a small number: lets list out possible combinations of lengths and widths.

1 * 20

2 * 10

4 * 5

L = 7 + 3w

lets see which on makes sense.

L = 7 + 3w

20 = w7 + 3w^2

3w^2 + 7w -20 = 0

(3w - 10)(w - 2)

w can equal 10/3 or 2.

So the dimensions: are Width = 2 Length = 10

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We'll use the standard parabola, oriented in the usual way.  In that case the directrix is a line y=k and the focus is a point (p,q).

The points (x,y) on the parabola are equidistant from the line to the point.  Since the distances are equal so are the squared distances.

The squared distance from (x,y) to the line y=k is </span>(y-k)^2
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The squared distance from (x,y) to (p,q) is </span>(x-p)^2+(y-q)^2.<span>
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3 years ago
Para hacer 600 m de una obra, 30 obreros han trabajado 12 dias a razon de 10 horas diarias. ¿Cuantos dias necesitaran 36 obreros
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Respuesta:

25 días

Explicación paso a paso:

Dado :

escenario 1

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Escenario 2:

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Número de días = n

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Igualar los parámetros en cada escenario:

12 / n = 36/30 * 6/10 * 600/900

12 / n = 6/5 * 3/5 * 2/3

12 / n = 6/5 * 1/5 * 2/1

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3 years ago
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Answer:

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3 years ago
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I think 4 divided by 8/9 - 1/2 = 4

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3 years ago
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alexandr402 [8]

Answer:

3

Step-by-step explanation:

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Just do it the other way to find the answer!

I hope this helps!

3 0
2 years ago
Read 2 more answers
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