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tatyana61 [14]
2 years ago
11

HELP!!!!I don’t get it. I need an explanation.

Mathematics
1 answer:
mestny [16]2 years ago
5 0

Answer: 9 is  -1

11 is -2 and 13 is -2

Step-by-step explanation:

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It is 22 cuz 5 * 2 is 10 and 10 * 2 IS 20 + 2=22

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Solve for x.
Ostrovityanka [42]

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C.  3, -7

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x^2 +4x-21 =0

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Using the zero product property

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Chatty made this square picture. She wants to glue yarn around the border to make a frame. How much yarn does she need?
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A circle has the center of (1,-5) and a radius of 5 determine the location of the point (4,-1)
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"determine the location" or namely, is it inside the circle, outside the circle, or right ON the circle?

well, we know the center is at (1,-5) and it has a radius of 5, so the distance from the center to any point on the circle will just be 5, now if (4,-1) is less than that away, is inside, if more than that is outiside and if it's exactly 5 is right ON the circle.

well, we can check by simply getting the distance from the center to the point (4,-1).

\bf ~~~~~~~~~~~~\textit{distance between 2 points} \\\\ \stackrel{center}{(\stackrel{x_1}{1}~,~\stackrel{y_1}{-5})}\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{-1})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ d = \sqrt{[4-1]^2+[-1-(-5)]^2}\implies d=\sqrt{(4-1)^2+(-1+5)^2} \\\\\\ d = \sqrt{3^2+4^2}\implies d =\sqrt{9+16}\implies d=\sqrt{25}\implies \stackrel{\textit{right on the circle}}{d = 5}

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3 years ago
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