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rjkz [21]
3 years ago
6

Loo at the picture! Need help!

Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
7 0
The answer is D
25 + 60i
loris [4]3 years ago
4 0
The correct answer would be D. 25 + 60i

Hope I helped you today :)
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X +3y =15 x-2y=10 help plz ​
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What is that

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Felix signs up for a cell phone that his parents require him to pay for. His bill is $46.80. What impact will his cell phone hav
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MULTIPLE CHOICE A triangle has an angle that measures 41° and an angle
m_a_m_a [10]

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117

Step-by-step explanation:

Sum of all the angles of a triangle is 180

Let the third angle be 'x'

41 + 22 + x = 180

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Please help me! These are due at 3 and I’m freaking out<br> Lol
iVinArrow [24]

Volume of sphere: \frac{4}{3}\pi r^3, put $r=5 in$

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6 0
3 years ago
If rectangle ABCD is rotated counter clock wise 90º about the origin, what will be the coordinates of the vertex D'?
7nadin3 [17]
So, the best way to do this is translate it to clockwise. 90 degrees counterclockwise is equal to 270 degrees clockwise. So, basically, to rotate, you would follow the following format for each point-
(X,Y) -> (-Y,X)
Now, you do it for each of the points.
A= (-5,5), so A' would be (-5,-5)
B= (-1,5), so B' would be (-5,-1)
C= (-5,4), so C' would be (-4,-5)
D= (-1,4) so D' would be (-4,-1)
Notice, how all the points end up in the square below it. Each quadrant has a specific number. The top right is quadrant 1, the top left is quadrant 2, the bottom left is quadrant 3, and the bottom right is quadrant 4. If you are rotating 270 degrees clockwise, you move to the right, like a clock. That puts the new rectangle in quadrant 3. That is a way to check your work.
Now, just so you know for future reference, the following are also different formats for different problems--
A 90 degree Clockwise rotation about the origin will be (X,Y) -> (Y, -X) *Note, -x just stands for the opposite. Say your original x is a negative number. Then the prime (new) x will be positive.
A 180 degree Clockwise rotation about the origin would be (X,Y) -> (-X,-Y) *Note, -y also stands for the opposite.
A 270 degree clockwise rotation about the origin would be (X,Y) -> (-Y,X).
For translating---
90 degrees Clockwise = 270 degrees Counter
270 degrees Clockwise = 90 degrees Counter

Hope this helped!
4 0
3 years ago
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