3 years ago

If quadrilateral ABCD rotates 90° counterclockwise about the origin, what are the coordinates of A′ in quadrilateral A′B′C′D′ ?

Mathematics

1 answer:

Mrac [35]3 years ago

4 0

Answer:

(-2,-1) after the original point (2,1) goes through the change of -y,x

Step-by-step explanation:

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Artyom0805 [142]

Answer:

x = -0.35

Step-by-step explanation:

tep 1 - Multiply 64 and 0.5x. The answer ends up being 32x

Step 2 - You need to get all of the variables on one side and the regular numbers on the other side. To do that, you need to subtract 2.5x from each side so you are left with the equation -10.5 = 29.5x

Step 3 - The final step is to isolate the variable. To do this, you divide each side by 29.5 meaning that x = -0.35

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3 years ago

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dimaraw [331]

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3 years ago

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lesya [120]

I wish I could help but I’m stúpid ;-;. Good luck finding the answer 00p

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3 years ago

Find the exact value by using a half-angle identity.<br><br> tan seven pi divided by eight

murzikaleks [220]

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Answer:

1 -√2

Step-by-step explanation:

$\tan(x/2)=\dfrac{1-\cos(x)}{\sin(x)}\\\\\tan\left(\dfrac{1}{2}\cdot\dfrac{7\pi}{4}\right)=\dfrac{1-\cos\dfrac{7\pi}{4}}{\sin\dfrac{7\pi}{4}}=\dfrac{1-\dfrac{1}{\sqrt{2}}}{-\dfrac{1}{\sqrt{2}}}=\boxed{1-\sqrt{2}}$

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3 years ago

Find the length of 1 side of square if the area is 49 sq.cm<br> method needed

ladessa [460]

Answer:

It would be 7cm

Step-by-step explanation:

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2 years ago