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3 years ago

Write an arithmetic sequence that has a common difference of -3 and whose

Mathematics

1 answer:

allsm [11]3 years ago

8 0

Answer:

Step-by-step explanation:

arithmetic sequences can be written as

$a_n = a_1 + (n-1)d\\$

in this case

$a_n = a_1 + (n-1)(-3)\\and\\17 = a_1 +(4-1)(-3)\\17= a_1 + (3)(-3)\\17= a_1 - 9\\a_1 = 26\\so\\a_n = 26 - 3(n-1)\\a_n = 26 -3n + 3\\a_n = 29 - 3n$

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Answer:

7 feet

Step-by-step explanation:

Pythagorean theorem

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2 years ago

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Atreya runs 5 1/4 miles in 3/4 of an hour. If Atreyu continues at this rate, how far will he run in an hour?

kogti [31]

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Step-by-step explanation:

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2 years ago

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Write the prime factorization of 3.

DaniilM [7]

Answer:

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Step-by-step explanation:

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3 years ago

10a3 what is the vocabulary for 10

dangina [55]

Answer:

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3 years ago

What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4

Tamiku [17]

Answer:

The ratio of the intensities is roughly 6:1.

Step-by-step explanation:

The intensity I() of an earthquake wave is given by:

$I = \frac{P}{4\pi d^{2}}$

<em>where P: is the power ans d: is the distance. </em>

Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

$\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}$

<em>where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km </em>

$\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}$

$\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}$

$\frac{I_{1}}{I_{2}} = 5.9:1$

Therefore, the ratio of the intensities is roughly 6:1.

I hope it helps you!

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3 years ago