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Zinaida [17]
3 years ago
14

Can some one help me its all the points i have :(

Mathematics
1 answer:
bija089 [108]3 years ago
5 0

Answer:

-2

Step-by-step explanation:

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Find all solutions to the equation. <br> cos^2 x +2cosx+1=0
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x= \pi

Step-by-step explanation:

\cos^2x+\cos x+1=0

Let u= \cos x

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It takes Emma 18 minutes to type and spell check 14 pages of a manuscript. Find how long it takes her to type and spell check 77
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Answer:

99 minutes, or an hour and 39 minutes.

Step-by-step explanation:

It takes Emma 18 minutes to do 14 pages. That means that we can set up a proportion, where Emma uses 18 minutes to do 14 pages, which is equal to x minutes per page!

\frac{18}{14} =\frac{x}{1}

14x = 18

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x = 9/7

So, each page takes 9/7 minutes for Emma to finish.

She will do 77 pages. 77 * (9/7) = 11 * 9 = 99.

So, it will take Emma 99 minutes, or an hour and 39 minutes, to type and spell check 77 pages.

Hope this helps!

7 0
4 years ago
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The scatterplot shown includes the (blue) least-squares regression line, whose equation is y = .975 + .005x, where y is calories
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The scatterplot shown includes the (blue) least-squares regression line, whose equation is y = .975 + .005x, where y is calories (in thousands) and x is years after 1960. Choose the correct statement.

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Hence the option a. Consumption is increasing at a rate of 5 calories per year. is correct

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Katyanochek1 [597]

Answer:

because the total is 300 not 100 so 50 is not reasonable because that is the percentage they planted and since it is more than 100 then it should be a percent of 300 not 100. Maya is wrong about placing 50 bulbs instead they placed 150.

Step-by-step explanation:

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The length of a rectangle is 3 times the width. If
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Answer:

Length = 27 metresWidth = 9 meters

Step-by-step explanation:

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3 years ago
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