Answer:
x+4=20 is a solution to 5(x+4)=100.
Step-by-step explanation:
Following PEMDAS, divide 5 from both sides of the equation 5(x+4)=100, and you have x+4=20 remaining.
This means that both equations have the same solution.
Answer:
Step-by-step explanation:
Hope this helps u !!
823.582% increase between the initial price and the current price.
Answer:
C. ![z = -20\sqrt{3}-i\,20](https://tex.z-dn.net/?f=z%20%3D%20-20%5Csqrt%7B3%7D-i%5C%2C20)
Step-by-step explanation:
The rectangular form of a complex number is represented by the following formula:
(1)
Where each coefficient can be determined as function of the polar components:
(2)
(3)
Where:
- Magnitude of the complex number, dimensionless.
- Direction of the complex number, measured in radians.
If we know that
and
, then the rectangular form of the number is:
![a = 40\cdot \cos \frac{7\pi}{6}](https://tex.z-dn.net/?f=a%20%3D%2040%5Ccdot%20%5Ccos%20%5Cfrac%7B7%5Cpi%7D%7B6%7D)
![a = -20\sqrt{3}](https://tex.z-dn.net/?f=a%20%3D%20-20%5Csqrt%7B3%7D)
![b = 40\cdot \sin \frac{7\pi}{6}](https://tex.z-dn.net/?f=b%20%3D%2040%5Ccdot%20%5Csin%20%5Cfrac%7B7%5Cpi%7D%7B6%7D)
![b = -20](https://tex.z-dn.net/?f=b%20%3D%20-20)
The rectangular form of
is
. The correct answer is C.