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Goshia [24]
3 years ago
15

(5x20)+(8x10) PLEASE HELP

Mathematics
2 answers:
jarptica [38.1K]3 years ago
7 0

Answer:

180

Step-by-step explanation:

5*20 is 100. 10 *8 is 80. then you add

Nonamiya [84]3 years ago
5 0
The answer to this equation is 8,000
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3 years ago
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-5, 20, -80, 320, ... is a geometric sequence a. Find the common ratio, b. Write its recursive rule c. Write its explicit rule.W
mario62 [17]

a.

In order to find the common ratio, we just need to divide a term by the term that comes before it.

So using the terms 20 and -5, we have:

\text{ratio}=\frac{20}{-5}=-4

b.

The recursive rule can be found with the formula:

a_n=a_{n-1}\cdot q

Where an is the nth term and q is the ratio. So we have:

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c.

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a_n=-5\cdot(-4)^{n-1}

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1 year ago
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Nataly_w [17]
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