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Len [333]
3 years ago
12

What is the sum of the first nine terms of this Sequence if the first term is 0?

Mathematics
2 answers:
Harlamova29_29 [7]3 years ago
8 0

Answer:

D. 160

Step-by-step explanation:

The sum of the sequence 1, 2, 3, 4, ... , n is n(n + 1)/2.

Here, you have the sum of 4(1, 2, 3, 4, ... , n), so the sum is 4[n(n + 1)/2]

In this case, the first term is 0, so the last term is the 8th term of the sequence above, so n = 8

4[n(n + 1)/2)] =

= 4[8(9)/2]

= 4[72/2]

= 4(36)

= 144

The closest answer is D. 160

pishuonlain [190]3 years ago
7 0

Answer:

The answer is B.

Step-by-step explanation:

First you write out the first nine multiples of 4. Then you add them.

4 + 8 + 12 + 16 + 20 + 24 + 28 + 32 + 36 = 180


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Which method or methods listed below describe a solid system for keeping financial records? I. Making a mental note of all purch
Nikitich [7]

Financial records  are important records and thus, needs to be saved safely. The method for solid system to keep it is: Option d. I, II, and III

<h3>How to safely keep financial records and why?</h3>

Financial records are records of all financial transactions and receipts. They're needed for future cases like some contradictions, to get past details, to analyze data to make prediction about future sale and for development of the organization etc.

For keeping them, they should be saved in an easily accessible, and hardly destroy-able place. So that its prevented safely but accessible faster with correct authentication.

For the given case, for solid system for keeping financial records, we can actually follow all the three steps provided.

I. Making a mental note of all purchases made during the week. II. Recording money spent in a hand-held notebook. III. Organizing receipts and transactions on a computer.

Thus,

The method for solid system to keep it is: Option d. I, II, and III

Learn more about financial records here:

brainly.com/question/4954869

7 0
2 years ago
Zamir needs to determine the height of the building
Svetach [21]

Answer:

Height of the building = 115.4 ft.

Step-by-step explanation:

Height of building = AB + 46.4 + CD + 30.5

By applying Pythagoras theorem in ΔABP,

(26)² = (10)²+ (AB)²

676 - 100 = AB²

AB² = 576

AB = 24 ft

By applying sine rule in ΔCDE,

cos(60°) = \frac{CD}{CE}

CD = CE × \frac{1}{2}

CD = \frac{29}{2}

CD = 14.5 ft

Total Height = 24 + 46.4 + 14.5 + 30.5

                     = 115.4 ft

6 0
3 years ago
True or false is the graph of y = 2/3 x + 4
Licemer1 [7]

Answer:

False. 2/3 is positive so therefore, it would be increasing, not decreasing.

Step-by-step explanation:

6 0
3 years ago
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