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Alchen [17]
3 years ago
13

Find the sum of the first 21 terms of the arithmetic sequence 5, -2, -9.

Mathematics
2 answers:
Vadim26 [7]3 years ago
6 0

Answer:

-1365

Step-by-step explanation:

The difference is -7, so you apply that to each number to get your answer.

USPshnik [31]3 years ago
5 0
The correct answer is idk for me
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Kira looked through online census information to determine the average number of people living in the homes in her city. What is
Pani-rosa [81]
<h3>Answer: D. Kira used published data that is quantitative.</h3>

The published data refers to the government census info being published online. She did not do an observational study because she didn't go to each household herself (rather let the census workers do that task).

The data is quantitative because she is looking at the number of people living in homes in her city. Quantitative data is simply dealing with quantities or numbers. Contrast this with qualitative data that talks about something like color choice.

6 0
2 years ago
If the temperature in the Arctic is -13C, but it then rises by 20C, what is the new temperature?
miv72 [106K]

Answer:7

Step-by-step explanation:

all you have to do is subtract 20-13

4 0
2 years ago
What is the area of a circle if half of it is 22 inches
Kobotan [32]

Answer: <em>The answer is 44.</em>

Step-by-step explanation:<em> </em><em>The answer is 44 because if half the area of the circle is 22 all you have to do is 22+22 or 22*2.</em>

<em />

<em>22+22=44  22*2=44</em>

3 0
3 years ago
Experimental data are collected as:
aliina [53]

Answer:

y = 1.00114x + 1.75243

Step-by-step explanation:

Given

The x and y values

Required

The regression line equation

Because of the length of the given data, I will run the analysis using online tools, then analyze the result.

From the analysis, we have:

\sum x = 5050

\sum y = 5231.1011

\bar x = 50.5

\bar y = 52.311

SSX = 83325 --- Sum of squares

SP = 83419.7626 --- Sum of products

The regression equation is calculated as:

y = ax + b

Where:

a = \frac{SP}{SSX}

So, we have:

a = \frac{83419.76}{83325}

a = 1.00114

b = \bar y - a * \bar x

b = 52.31 - (1.00114*50.5)

b = 1.75243

So:

y = ax + b becomes

y = 1.00114x + 1.75243

6 0
2 years ago
There are 96 dogs at the dog park.
BARSIC [14]

Answer:

4 dogs :]

Step-by-step explanation:

1/8 brown dogs = 12 dogs

5/6 black dogs = 80 dogs

12 + 80 = 92

96 - 92 = 4

Therefore, 4 dogs are mixed colors.

Hope this helps, sorry if this is wrong! Have a great day! <)

6 0
3 years ago
Read 2 more answers
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