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tekilochka [14]
3 years ago
15

What is ∑[100(−4)n−1] equal to? 4 is on top n=1 on bottom

Mathematics
2 answers:
saveliy_v [14]3 years ago
8 0
    4
<span>   ∑ [100(−4)n−1]
  n=1

Once again, since this is summation notation:

</span>Start at the number on the bottom. Plug in that number to the equation on the right, plug in the next number into the equation on the right, and so on, until you get to the number on top. Plug in that final number, and after you get the solution, add all the solutions you have all together.

<span>One thing though: <span>the bottom number cannot be bigger than the number on top.
</span></span>
n=1; 100 x (-4) x (1) - 1 = -401
n=2; 100 x (-4) x (2) - 1 = -801
n=3; 100 x (-4) x (3) - 1 = -12001
n=4; 100 x (-4) x (4) - 1 = - 16001

-401-801-12001-16001 = -29204
antiseptic1488 [7]3 years ago
5 0

Answer:

I tried using that other answer but it wasn't correct, this is the right answer!!!

Step-by-step explanation:

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Pls help with all 4 questions, and show a step by step explanation (show how you set up the problems)
Ainat [17]
<h2>Answer:</h2>

<u>Question 10:</u>

21.75 ÷ 30 = 0.725

Move the decimal backwards 2 times

72.5

<em>Answer: </em>72.5%

<u>Question 11:</u>

Sales: $768

Commission Rate: 4%

Commission: $30.72

768 x 4 = 3,072

3,072 ÷ 100 = 30.72

<em>Answer:</em> $30.72

<u>Question 12:</u>

Selling Price: $39.98

Tax Rate: 4.5%

Sales Tax: $1.80

39.98 x 4.5 = 179.91

179.91 ÷ 100 = 1.7991

Then you round to the thousandths.

1.799

1.8

<em>Answer:</em> $1.80

<u>Question 13:</u>

20% x 141 = 28.2

141 + 28.2 = 169.2

<em>Answer:</em> $28.20 gratuity is added to the bill.

8 0
2 years ago
What method would best to solve x=5y. 2x-3y=7
ser-zykov [4K]

Answer:

substituting x=5y into 2x-3y=7, Answer: y = 1 x = 5

Step-by-step explanation:

2(5y)-3y=7

10y-3y=7

7y=7

y=1

substitute y=1 into x=5y

x=5(1)

x=5


8 0
3 years ago
6. Explain how you need 2 coordinate pairs to access and apply the Slope formula ?
Basile [38]

Answer:

so (know) the two points on the line then select one to be 1x, y1 and the other to be x2, y2 use what i just showed u to calculate the slope

Step-by-step explanation:

Step One: Identify two points on the line.

Step Two: Select one to be (x1, y1) and the other to be (x2, y2).

Step Three: Use the slope equation to calculate slope.

7 0
2 years ago
What number is 38% of 88
nignag [31]

Answer:

33.44

Step-by-step explanation:

Use this calculator to find percentages. Just type in any box and the result will be calculated automatically.

Calculator 1: Calculate the percentage of a number.

For example: 38% of 88 = 33.44

Calculator 2: Calculate a percentage based on 2 numbers.

For example: 33.44/88 = 38%

8 0
3 years ago
Read 2 more answers
Can somebody explain how to do this
s2008m [1.1K]

Answer:

Step-by-step explanation:

que podríamos hacer para obtener información sobre la participación democrática en la familia desde las tablas de frecuencias que hemos elaborado con los datos de la encuesta

7 0
3 years ago
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