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kherson [118]
3 years ago
15

Find an explicit rule for the nth term of the sequence. 7, 21, 63, 189, ...

Mathematics
1 answer:
SpyIntel [72]3 years ago
8 0

Answer:

7 \times  {3}^{n - 1}

Step-by-step explanation:

using form:

a \times  {r}^{n - 1}

where a: starting number

where r: common ratio (in this case each next term is 3 times previous term)

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For a biology project, you measure the weight in grams and the tail length in millimeters of a group of mice. The correlation is
olga nikolaevna [1]

Answer:

Step-by-step explanation:

Given that for a biology project, you measure the weight in grams and the tail length in millimeters of a group of mice.

The correlation is r = 0.9

If you had measured tail length in centimeters instead of millimeters, what would be the correlation?

For this we must understand the meaning of correlation and formula

Correlation is a measure of linear association between the two variables and always lie between -1 and 1

This is got by dividing covariance of (x,y) by product of std deviation of x and y

So because we changed the units of length correlation coefficient would not change.

It would remain the same as 0.90

8 0
3 years ago
8.2cm in millimeters
leonid [27]
The answer would be 82 millimeters!

6 0
3 years ago
There is a square. the square's length is 4. what is the area?
san4es73 [151]
Area of square = a^2 = 4^2 = 4 x 4 = 16

answer
16
7 0
3 years ago
Read 2 more answers
HELP!!!!!!!!!!!!!!!!!!!!
solong [7]

Answer:

y = -1/2x+4

Step-by-step explanation:

y = 2x-1

This equation is in slope intercept form  y = mx+b  where m is the slope

m=2

A line perpendicular will have a slope that is the negative reciprocal

m = -1/2

Using the slope intercept form

y = mx+b

y = -1/2x+b

and the point given (2,3)

3 = -1/2(2)+b

3 = -1+b

4 =b

y = -1/2x+4  is the equation of a line that is perpendicular to the original line and contains (2,3)

6 0
2 years ago
What is 4/10, 6/20, and 10/25 in simplest form?
Dennis_Churaev [7]
4/10 in simplest form is 2/5
6/20 in simplest form is 3/10
10/25 in simplest form is 2/5
3 0
3 years ago
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