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Trava [24]
2 years ago
7

PLEASE HELP ME WITH THIS!! ILL GIVE BRAINLIEST.

Mathematics
1 answer:
LekaFEV [45]2 years ago
4 0

Answer:

See below.

Step-by-step explanation:

A correct.

B correct.

C correct.

D correct.

E incorrect.

F correct.

G incorrect.

H correct.

I incorrect.

J incorrect.

K correctt.

-hope it helps

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Find the 10th partial sum of the arithmetic sequence defined by
Evgesh-ka [11]

Answer:

22.5


Step-by-step explanation:

If you expand the series, you can see the first few terms of the series:

  • Putting 1 in n, \frac{1}{2}(1)-\frac{1}{2}=0
  • Putting 2 in n, \frac{1}{2}(2)-\frac{1}{2}=0.5
  • Putting 3 in n, \frac{1}{2}(3)-\frac{1}{2}=1
  • Putting 4 in n, \frac{1}{2}(4)-\frac{1}{2}=1.5

We can see the series is 0, 0.5, 1, 1.5, ....

This is an arithmetic series with common difference (the difference in 2 terms) 0.5 and first term 0.

We know formula for sum of arithmetic series:

s_{n}=\frac{n}{2}(2a+(n-1)d)

Where,

  • S_{n} denotes the nth partial sum
  • a is the first term (in our case it is 0)
  • n is the term (in our case it is 10 since we want to find 10th partial sum -- sum until first 10 terms)
  • d is the common difference (difference in term and the previous term) (in our case it is 0.5)

Substituting these into the formula, we get the 10th partial sum to be:

s_{10}=\frac{10}{2}(2(0)+(10-1)(0.5))\\s_{10}=5(0+(9)(0.5))\\s_{10}=5(0+4.5)\\s_{10}=5(4.5)\\s_{10}=22.5

So the sum of the first 10 terms is 22.5. Third answer choice is right.


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Step-by-step explanation:

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Please help me <br>why - 9/5-1=-14/5​
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Answer:

Step-by-step explanation:

Because you have to take the L.C.M ,

-9/5 - 1

=( -9-5)/5

= -14/5

please  

Brain-list it or support me at my U-Tube channel " ZK SOFT&GAMING " I will be thankful

6 0
3 years ago
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If a barrel averages 50 pounds and a crate 160 ​pounds, write an inequality that describes when x barrels and y crates will caus
irakobra [83]

Answer:

https://iepa.org.au/network-news/it

Step-by-step explanation:

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