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Setler79 [48]
3 years ago
14

the first term of an arithmetic sequence is 3000 and the tenth term is 1200. the sum of the first 20 terms of the sequence

Mathematics
1 answer:
Kruka [31]3 years ago
8 0

Step-by-step explanation:

B

1100

To find the sum of the first n terms of an arithmetic series use the formula,

S

n

=

2

n(a

1

+a

n

)

S

20

=

2

20(10+100)

S

20

=

2

2200

S

20

=1100

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ElenaW [278]

Answer:

In order, your numbers are

22, 45, 75, 89, 89, 95, 100

The median is the number that is in the middle numbers of all your numbers. The median is 89, since it is in the very middle.

The mean is all your numbers added together and then divided by how ever many numbers you have. 22 + 45 + 75 + 89 + 89 + 95 + 100 = 515. Since you have 7 numbers, you would divide 515 by 7, which equals 73.5. The mean is 73.5.

The mode is the number that has the most numbers(not sure how to word it) Since 89 has two of the numbers, and no other numbers have duplicates, your mode is 89.

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Answer:

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Step-by-step explanation:

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3 years ago
PLEASE HELP ME I NEED THIS ANSWER FOR ALGEBRA!
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Answer:

radius  = 6.2

Step-by-step explanation:

so you already have the formula, which is

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Answer:

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