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LUCKY_DIMON [66]
3 years ago
14

Find the indicated sum for each sequence. S9 of –9, 36, –144, 576, ...

Mathematics
1 answer:
gogolik [260]3 years ago
5 0

This is a geometric sequence with a common ratio of -4:

-9*-4=36

36*-4=-144

-144*-4=576

Thus, the 9th term would be equal to:

(-4)^5*576 which is -589824

The exponent 5 comes from the fact that 4 terms have already been displayed and we need 9-4 more terms to get to the 9th term. Since we are multiplying by -4 only, the 5 remains an exponent

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EleoNora [17]

3+32= 35

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The mean distance of the Moon from Earth is 2.39x10^5 miles. Assuming that the orbit of the Moon around Earth is circular and th
olya-2409 [2.1K]

Answer:

2291,94 mph

Step-by-step explanation:

To solve this we need to consider the distance 2.39x10^5 miles as the distance between the center of the earth and the center of the moon, if not we would need to know the radius of the earth and the moon.

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3 years ago
15 less than a number tripled is equivalent to the difference of the same number and 12
Nitella [24]

Step-by-step explanation:

x = number

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3x - 15 = -4x + 48 or -48 + 4x

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33 = x

4 0
2 years ago
Find the quotient:<br> 8(cos275+ i sin275) / 16(cos180+ i sin180)
Art [367]

the answer is D, you divide 8 by 16 you get 2 in below the division sign, cosine 180 is -1 , sine 180 is zero so the imaginary number cancels out leaving only -1 multiplied by 2 equals -2 then cosine and sine 95 equal negative the cosine and sine of 275 you take the negative sign common factor divide it by the negative sign of 2 and you get the answer is d

5 0
3 years ago
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2 years ago
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