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In-s [12.5K]
2 years ago
5

The product of 7 and a nimber increased by 3 is equal to twice the number subtracted from 39

Mathematics
1 answer:
miss Akunina [59]2 years ago
7 0
Let the number is = x

So number increased by 3 is = x+3.

So product of 7 and (x+3) is = 7*(x+3).

Twice of number is = 2x

So we can write 

7(x+3) = 39 - 2x

7x + 21 = 39 - 2x

Now we can arrange the term as

7x + 2x = 39 - 21

9x = 18

x = 2.

SO the number is 2.
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The answer to your question is below

Step-by-step explanation:

Data

Center = (0, 0)

Vertex = (13, 0)

Focus = (12, 0)

Process

From the data we know that it is a horizontal ellipse.

1.- Calculate "a", the distance from the center to the vertex.

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2.- Calculate "c", the distance from the center to the focus

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3.- Calculate b

Use the Pythagorean theorem to find it

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-Simplification

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