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3 years ago

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Which could be the missing first term of the expression that, when fully simplified, would be a binomial with a degree of 4? Che

ck all that apply.
________ – 5xy3 + 9x2y

1 ) 0

2) 5xy3

3) 9x2y

4) 8y4

5) 4xy3

1 answer:

Drupady [299]3 years ago

6 0

The answer to the question is 5) 4xy3

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Some types of algae have the potential to cause damage to river ecosystems. Suppose the accompanying data on algae colony densit

kondor19780726 [428]

Answer:

The equation of the regression line is:

$y~=~234.56158 ~-~ 2.95835 \cdot x$

Step-by-step explanation:

The Least Squares Regression Line is the line that makes the vertical distance from the data points to the regression line as small as possible. It’s called a “least squares” because the best line of fit is one that minimizes the variance.

We have the following data:

$\begin{array}{c|ccccccccc}X&50&55&50&79&44&37&70&45&49\\Y&152&48&22&35&43&171&13&185&25\end{array}$

To find the line of best fit for the points:

Step 1: Find $X\cdot X$ and $X\cdot Y$ as it was done in the table

Step 2: Find the sum of every column:

$\sum{X} = 479 ~,~ \sum{Y} = 694 ~,~ \sum{X \cdot Y} = 32784 ~,~ \sum{X^2} = 26897$

Step 3: Use the following equations to find a and b:

$\begin{aligned} a &= \frac{\sum{Y} \cdot \sum{X^2} - \sum{X} \cdot \sum{XY} }{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 694 \cdot 26897 - 479 \cdot 32784}{ 9 \cdot 26897 - 479^2} \approx 234.56158 \\ \\b &= \frac{ n \cdot \sum{XY} - \sum{X} \cdot \sum{Y}}{n \cdot \sum{X^2} - \left(\sum{X}\right)^2} = \frac{ 9 \cdot 32784 - 479 \cdot 694 }{ 9 \cdot 26897 - \left( 479 \right)^2} \approx -2.95835\end{aligned}$

Step 4: Assemble the equation of a line

$\begin{aligned} y~&=~a ~+~ b \cdot x \\y~=~234.56158 ~-~ 2.95835\cdot x\end{aligned}$

The graph of the regression line is:

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4 years ago

our success rate ,depending on the year,is between 35 and 40 percent ,according to the website,in 2015,234 raptors were taken in

Vilka [71]

Number of raptors in 2015: 234

% success: between 35% and 40%

Formula

% =: [number of success rescues / number of total rescues] * 100 =>

number of success rescues = % * number of total rescuess / 100

Number of success rescues:

a) 35 * 234 / 100 = 0.35 * 234 = 81.9

b) 40 * 234 / 100 = 0.40 * 234 = 93.6

Then, the number of raptor rescues that were succesfull was about 82 to 94.

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4 years ago

What writing a crop product means

DedPeter [7]

Its defined only for three dimensional vectors.
it would be written as "a x b"
hoped this helped a bit

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3 years ago

*help*<br> Simplify by combining like terms: 10x - 12y + 8 + 12y *

Talja [164]

Answer:

Hope this helps and have a great day! :)

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3 years ago

Read 2 more answers

assume a telephone signal travels through a cable at two-thirds the speed of light. how long does it take the signal to get from

Helen [10]

The time length for a sign to travel from new york to Miami is 0.089 seconds.

We understand the speed of mild in miles per 2nd is 186,000.

the rate of smartphone signal is 2/3rd is =2/3rd of 186,000

= 124,000 miles in line with 2nd

Distance among Miami and new york is given to be 1100 miles.

So, the time required to journey the phone signal from new york city to Miami is = distance ÷ speed

= 1100 ÷ 124,000

=0.089 seconds

Time taken via the telephone sign from Miami to new york is 0.089 seconds.

To learn more about the speed distance concept visit the link: brainly.com/question/28224010

#SPJ4

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2 years ago