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adoni [48]
3 years ago
5

This isn't really a school-related question.It's more of a conflict I have with my self. So: I have a friend that constantly cop

ies my work, and homework. When we have homework assigned to us, my friend always tell me to send her a pic of the work and answer. Since I'm weak-willed, I can't say no to her, especially since she is one of the few friends that I have at my school. What do I do, especially now that we have a HUGE project to do that is worth at least 40% of our grade, since she is telling me send a pic of my answers on the project to her?
Mathematics
1 answer:
ycow [4]3 years ago
8 0
Well to be honest, you need to straight forward to her and tell her that you do not appreciate her copying you and tell her you dont want to be rude or anything, but this needs to stop.
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Express the quotient of z1 and z2 in standard form given that <img src="https://tex.z-dn.net/?f=z_%7B1%7D%20%3D%20-3%5Bcos%28%5C
Lesechka [4]

Answer:

Solution : -\frac{3}{4}-\frac{3}{4}i

Step-by-step explanation:

-3\left[\cos \left(\frac{-\pi }{4}\right)+i\sin \left(\frac{-\pi \:}{4}\right)\right]\:\div \:2\sqrt{2}\left[\cos \left(\frac{-\pi \:\:}{2}\right)+i\sin \left(\frac{-\pi \:\:\:}{2}\right)\right]

Let's apply trivial identities here. We know that cos(-π / 4) = √2 / 2, sin(-π / 4) = - √2 / 2, cos(-π / 2) = 0, sin(-π / 2) = - 1. Let's substitute those values,

\frac{-3\left(\frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}i\right)}{2\sqrt{2}\left(0-1\right)i}

=-3\left(\frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}i\right) ÷ 2\sqrt{2}\left(0-1\right)i

= 3\left(-\frac{\sqrt{2}i}{2}+\frac{\sqrt{2}}{2}\right) ÷ -2\sqrt{2}i

= \frac{3\left(1-i\right)}{\sqrt{2}}÷ 2\sqrt{2}i = -3-3i ÷ 4 = -\frac{3}{4}-\frac{3}{4}i

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3 years ago
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Answer:

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First off, all triangles have a total angle of 180 degrees.

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So, add together the two angles we know:

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So we know 108 degrees of our triangle. We must find whats left of the 180.

To do this, subtract 108 from 180:

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So our remaining angle is 72 degrres.

But recall that x isnt the misisng angle, 9x is.

So, to get x on its own, we must divide both the missing angle and 9x by 9:

72=9x

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9   9

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So now we know that x equals 8.

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