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lara [203]
3 years ago
10

Can someone plz help me

Mathematics
1 answer:
earnstyle [38]3 years ago
6 0

Answer:

X=37.6 because the 90 degree angle plus the 52.4 equals 142.4 the subtract that from 180 then ta da.

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Find the product of z1 and z2, where z1 = 7(cos 40° + i sin 40°) and z2 = 6(cos 145° + i sin 145°).
Oduvanchick [21]
For two complex numbers z_1=re^{i\theta}=r(\cos\theta+i\sin\theta) and z_2=se^{i\varphi}=s(\cos\varphi+i\sin\varphi), the product is

z_1z_2=rse^{i(\theta+\varphi)}=rs(\cos(\theta+\varphi)+i\sin(\theta+\varphi))

That is, you multiply the moduli and add the arguments. You have z_1=7e^{i40^\circ} and z_2=6e^{i145^\circ}, so the product is

z_1z_2=7\times6(\cos(40^\circ+145^\circ)+i\sin(40^\circ+145^\circ)=42(\cos185^\circ+i\sin185^\circ)=42e^{i185^\circ}
3 0
3 years ago
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Five tickets are selected at random, and those five people win a gift card. If 231 tickets were purchased for the fundraiser, ho
Arada [10]

Answer:

46.2

Step-by-step explanation:

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7 0
3 years ago
Evaluate 1/2m - 2/3n when m = 3 and n = 8.
Anika [276]

Answer:

1/2(3)-2/3(8)

3/2-9/3

<u>3</u>-<u>9</u>

2.3

<u>9</u><u>-</u><u>3</u><u>2</u>

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7 0
3 years ago
-189=4x-3(-4x+15) help me i need help badly
lyudmila [28]

Answer:

Step-by-step explanation:

−189=4x−3(−4x+15)

−189=16x−45

16x−45=−189

16x−45+45=−189+45

16x=−144

16x /16

= −144 /16

x=−9

Good luck honey !!

7 0
3 years ago
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Doss [256]
You need to divide 320000 by 2 since the speed was divided by 2. The final answer is ...... 160000 Joules.

I hope this helped!!!! :D
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3 years ago
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