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3 years ago

Is this an arthimatic sequence ? 10,20,40,80

Mathematics

1 answer:

elena55 [62]3 years ago

7 0

An arithmetic sequence has a common difference between each term in the series. A geometric sequence has a common ratio between each term in the series.

First, let's determine the rate of change between each term.

10, 20 = multiplied by 2

20, 40 = multiplied by 2

40, 80 = multiplied by 2

The terms appear to have a common ratio of 2, making this a geometric sequence. Therefore, this is NOT an arithmetic sequence.

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3 years ago

What is the midpoint of AB?

Citrus2011 [14]

Answer:

$(-4, -\frac{1}{2})$

Step-by-step explanation:

Hi there!

We are given the line segment, with the end points AB

The coordinates of A are (-5, -4), and the coordinates of B are (-3, 3).

We want to find the midpoint of the line segment AB

The midpoint formula is given as $(\frac{x_1+ x_2}{2}, \frac{y_1 + y_2}{2})$ , where $(x_1, y_1)$ and $(x_2, y_2)$ are coordinates

We have two coordinates, which is what we need, but let's label their values to avoid any confusion:

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Now substitute those values into the formula:

$(\frac{x_1+ x_2}{2}, \frac{y_1 + y_2}{2})$

$(\frac{-5+ -3}{2}, \frac{-4+ 3}{2})$

Now simplify the numerator and denominator

$(\frac{-8}{2}, \frac{-1}{2})$

Simplify again:

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Hope this helps!

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3 years ago

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Answer:

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Gold Paint needed: 545 inch²

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Is there a door or something? I'm assuming not because you didn't include it in your question.

Surface Area:

(7*15*2)+(15*20*2)+(20*7*2)=

210+600+280=

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If he paints half the doghouse blue and the other half gold then simply divide the surface area by 2:

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He needs 545 inches² of blue paint

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