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2 years ago

What ia the common ratio of the sequence? -2 , 6, -18, 54,...

Mathematics

1 answer:

Jlenok [28]2 years ago

7 0

Its a multiplication by -3 on each term, so I think you're gonna answer is by r=-3, maybe?

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The number of newly reported crime cases in a county in New York State is shown in

JulsSmile [24]

Answer:

The linear regression equation that represents the set of data is:

$y=1083.48+23.73x$

The predicted number of new cases for 2013 is 1368.

Step-by-step explanation:

The general form of a linear regression is:

$y=a+bx$

Here,

y = dependent variable

x = independent variable

a = intercept

b = slope

Compute the values of a and b as follows:

$\begin{aligned} a &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 6857 \cdot 55 - 15 \cdot 17558}{ 6 \cdot 55 - 15^2} \approx 1083.476 \\ \\b &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 6 \cdot 17558 - 15 \cdot 6857 }{ 6 \cdot 55 - \left( 15 \right)^2} \approx 23.743\end{aligned}$

The linear regression equation that represents the set of data is:

$y=1083.48+23.73x$

Compute the predicted value of the number of new cases for 2013 (i.e. x = 12) as follows:

$y=1083.48+23.73x$

$=1083.48+(23.73\times12)\\\\=1083.48+284.76\\\\=1368.24\\\\\approx 1368$

Thus, the predicted number of new cases for 2013 is 1368.

8 0

3 years ago

How to solve this equation 2(f+3)+4f=6+6f?

Tresset [83]

2f+6+4f=6+6f
6f+6-6=6-6+6f
6f=6f
This means f can equal any number which we call mathematically infinite solution or infinitely many solutions

5 0

2 years ago

Read 2 more answers

everyday a person uses about 90 liters of water at home 6 gallons is about 23 liters about how many liters of water does a perso

Trava [24]

Answer:

90 liters

Step-by-step explanation:

It's given in the question!

3 0

1 year ago

Find all solutions to the equation. 7 sin2x - 14 sin x + 2 = -5

cestrela7 [59]

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7 0

3 years ago

Read 2 more answers

20% of the dogs at the pound needed medical care. what is the ratio of dogs that needed care and dogs that did not

Aleksandr-060686 [28]

I believe it is 1 : 5. Hope this helps :)

7 0

2 years ago