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love history [14]
2 years ago
6

What is the value of (-1/2)-4?

Mathematics
1 answer:
kykrilka [37]2 years ago
4 0
The answer would be A. -16
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Find a common multiplier then divide ex. 21/27 = 7/9 
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Find the volume of the composite solid. Round your answer to the nearest tenth.
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the ans is 310.86......

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Simplify the following expression: 8x − 8y + 5z − 3x − 14y + 3z
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Find the sum of the first 8 terms of the following sequence. Round to the nearest hundredth if necessary
AlexFokin [52]

The sum of the first 8 terms is 2.51 to the nearest hundredth

Step-by-step explanation:

In the geometric sequence there is a constant ratio between each two consecutive terms

The formula of the sum of n terms of a geometric sequence is:

S_{n}=\frac{a(1-r^{n})}{1-r} , where

  • a is the first term
  • r is the constant ratio between the consecutive terms

∵ The sequence is 6 , -5 , 25/6 , .............

∵ -5 ÷ 6 = \frac{-5}{6}

∵ \frac{25}{6} ÷ -5 = \frac{-5}{6}

- There is a constant ratio between the consecutive terms

∴ The sequence is a geometric sequence

∵ The first term is 6

∴ a = 6

∵ The constant ratio is \frac{-5}{6}

∴ r =  \frac{-5}{6}

∵ We need to find the sum of 8 terms

∴ n = 8

- Substitute the values of a, r and n in the rule above

∴ S_{8}=\frac{6[1-(\frac{-5}{6})^{8}]}{1-(\frac{-5}{6})}

∴ S_{8}=2.511595508

- Round it to the nearest hundredth

∴ S_{8}=2.51

The sum of the first 8 terms is 2.51 to the nearest hundredth

Learn more:

You can learn more about the sequences in brainly.com/question/7221312

#LearnwithBrainly

3 0
3 years ago
What’s the circumference of a circle with a diameter of 9 inches? Use 13.14 for n
Oksanka [162]

Answer:

28.26 inches

Step-by-step explanation:

The circumference of a circle is\pi d, where d = diameter. In this case, we use pi as 3.14 and the diameter as 9.

  • 3.14 * 9
  • 28.26

Therefore, the answer is 28.26.

Have a lovely rest of your day/night, and good luck with your assignments! ♡

3 0
2 years ago
Read 2 more answers
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