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olya-2409 [2.1K]
3 years ago
14

Please help. I'm trying to help my son with this and I'm so confused.

Mathematics
1 answer:
andre [41]3 years ago
7 0

Answer: C and D

Step-by-step explanation:

Equations C and D both have a slope of 0, that way they are parallel to the x-axis and perpendicular to the y-axis as both equations are interms of y.

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Triangles DEF and D'E'F' are shown on the coordinate plane below: . . Triangle DEF and triangle D prime E prime F prime with ord
Brilliant_brown [7]
<span><u><em>The correct answer is:</em></u>
180</span>°<span> rotation.

<u><em>Explanation: </em></u>
<span>Comparing the points D, E and F to D', E' and F', we see that the x- and y-coordinates of each <u>have been negated</u>, but they are still <u>in the same position in the ordered pair. </u>

 <u>A 90</u></span></span><u>°</u><span><span><u> rotation counterclockwise</u> will take coordinates (x, y) and map them to (-y, x), negating the y-coordinate and swapping the x- and y-coordinates.

<u> A 90</u></span></span><u>°</u><span><span><u> rotation clockwise</u> will map coordinates (x, y) to (y, -x), negating the x-coordinate and swapping the x- and y-coordinates.

Performing either of these would leave our image with a coordinate that needs negated, as well as needing to swap the coordinates back around. 

This means we would have to perform <u>the same rotation again</u>; if we began with 90</span></span>°<span><span> clockwise, we would rotate 90 degrees clockwise again; if we began with 90</span></span>°<span><span> counter-clockwise, we would rotate 90 degrees counterclockwise again. Either way this rotates the figure a total of 180</span></span>°<span><span> and gives us the desired coordinates.</span></span>
4 0
3 years ago
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The sum of twice a number and five is greater than three times the number minus three.
AnnZ [28]

Answer:

x<8

Step-by-step explanation:

2x+5>3x-3

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8>x

5 0
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One

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both equations are linear and they are not co-linear

therefore there is exactly 1 solutio

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